Climate Change

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“Doom and Dinosaurs,”** a look at how mass extinctions shaped the dinosaurs and what research on these events tells us about Earth life’s long-term prospects, with Ian Wilenzik, paleontologist and visiting assistant professor of biology at George Washington University. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/dc-doom-and-dinosaurs](https://events.ticketleap.com/tickets/profsandpints/dc-doom-and-dinosaurs) .] Pity the poor dinosaurs. They lacked both scientific research to help deal with potential environmental catastrophes and places where they could have a beer and discuss it. You, on the other hand, have the opportunity to come to Profs and Pints to hear a fascinating talk on the impact of mass extinctions on dinosaur evolution and what research on dinosaurs tells us about biodiversity and Earth’s current biodiversity crisis. Dr. Ian Wilenzik, who has studied and taught courses on dinosaur evolution, population spread, and extinction, will leave you with a greater appreciation of the resilience of life on earth and how we’re both the product and source of biologically catastrophic events. Many of us are familiar with how a big meteor impact about 66 million years ago wiped out the Earth’s dinosaur population, leaving us only with their feathered descendants, birds. Less well known is how the Earth actually has undergone five periods of mass extinction that wiped out nearly all life, and how dinosaurs arose from one and endured another—both caused by volcanic activity—before meeting their match in the third. To ground his discussion, Dr. Wilenzik will talk about how we study mass extinctions by looking for geologic evidence of volcanic activity, meteoric blasts, and other catastrophic activity and of gaps in the fossil record after them. He’ll also discuss what makes a dinosaur a dinosaur, describing their distinct anatomical features. He’ll talk about how they and other forms of life evolved over long periods of time and were affected by extinction events. We’ll look at how the meteor-caused mass extinction that wiped out dinosaurs at the end of the Cretaceous paved the way for the rise of mammals and the emergence of primates, and, eventually, us. Looking ahead to future mass extinctions and what might survive them, we’ll talk about how that plant you forget to water might have the last laugh, as well as why crocodiles might be around a while. (Doors: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image: A *Triceratops* mounted skeleton at the Los Angeles Museum of Natural History (Photo by Allie Caulfield / Wikimedia Commons).

Climbers of all skill levels are welcome to Join "Sends with Friends" rock climbing community for an indoor rock climbing (top rope or lead) event at [Movement Rockville gym](https://maps.app.goo.gl/ZZD5jntgU4Y6fY9A9)! **$15 Day-Pass for non-movement climbers!** Here's what you need: 1. Signed [waiver](https://movementgyms.com/waiver/): https://movementgyms.com/waiver/ 2. Belay check, which can be done the same day. See [Your First Visit](https://movementgyms.com/first-visit/) page for more info: https://movementgyms.com/first-visit/ If this is your first time signing the waiver with Movement gyms, **your first visit will be free of charge**, all climbing gears included. To find us, go past the front desk and turn left. We'll gather by the benches next to the fitness room entrance. If you are completely new to climbing, you are welcome to come and try it with us after you take the Introduction to Rope Climbing Course which will be free of charge for you if you let me know. This meetup is free and run by volunteer organizers, however, access to Movement gyms requires a membership or purchase of a day pass. This meetup is for belaytionship only, unwanted advances will not be tolerated. **Sends with Friends Rock Climbing Meetup Waiver and Release of Liability** **NOTICE:** By signing up for this event, you agree to the terms outlined below and acknowledge the inherent risks associated with rock climbing activities. Participation in any event organized by this Meetup group is contingent upon your agreement to this release form. **1\. Assumption of Risk:** I, the undersigned participant, acknowledge and fully understand that rock climbing is a high-risk activity. I am aware that participation involves risks including, but not limited to, physical injury, permanent disability, or death. These risks may arise from, but are not limited to, natural hazards, equipment failure, human error, and the actions or negligence of others. **2\. Release of Liability:** In consideration of being allowed to participate in any activity organized by this Meetup group, I hereby release and discharge the organizer(s), co-organizer(s), event leaders, and all other participants from any and all claims, demands, actions, or causes of action arising out of or connected to my participation, including claims arising from negligence or gross negligence. **3\. Personal Responsibility:** I acknowledge that I am solely responsible for my own safety during these events. I will use my own judgment in evaluating the risks involved and will take appropriate precautions, including but not limited to: * Wearing appropriate safety gear. * Using reliable climbing equipment. * Following established safety protocols. * Refraining from participating in activities beyond my skill level. **4\. Medical Fitness:** I affirm that I am in good health and physically capable of participating in rock climbing activities. I assume full responsibility for any medical conditions that may affect my ability to participate safely. **5\. Indemnity Agreement:** I agree to indemnify and hold harmless the organizer(s), co-organizer(s), event leaders, and other participants from any claims, damages, or expenses (including legal fees) arising out of or related to my actions or participation in these activities. **6\. Photo/Video Release \(Optional\):** By signing this waiver, I grant permission for any photographs or videos taken during the events to be used for promotional or group-related purposes. (Participants may opt out by notifying the organizer.) **7\. Agreement to Follow Rules:** I agree to abide by all rules, instructions, and guidance provided by the event organizers and leaders. Failure to comply may result in my removal from the group. **8\. Acknowledgment of Agreement:** By joining any event organized by this Meetup group, I acknowledge that I have read and understood this waiver and release form. I agree that my participation in any event constitutes my electronic or physical signature to this agreement.

*You must read the following NVHC Sign-in Sheet Statement/Liability Disclaimer, [https://nvhc.com/signin.pdf](https://nvhc.com/signin.pdf) and then answer the question that you will see when you RSVP with "I accept" to be permitted on the hike.* Distance: 3.5 miles Elevation change: about 100' Earth Day is Wednesday, April 22! How far have we come since the first Earth Day in 1970? Join us at the 500-acre Lake Accotink Park, a surprising retreat in the middle of suburban Fairfax County. We'll walk partly on and partly off the main trail and along the lake shore on natural surface trails (about 4 miles total). We'll walk by an active eagle nest that is visible from the trail, unless the leaves are out. We may see the eagles flying around the lake. We'll find a variety of native plants, including the native azalea. **We meet at the parking lot by the dam**, then hike on natural surface side trails that most park visitors don’t know about. I'm also a naturalist, so we will stop occasionally to look at spring wildflowers. Some of the terrain is hillier than the main trail around the lake, with an elevation change of about 100 feet from lowest to highest, with many short but steep hills that make for a good workout for a suburban location. The route has small rocks, roots, and a couple of small stream crossings and is not suitable for people with difficulty walking. Pace is about 2 mph average with occasional short stops for checking out nature and discussing Earth Day. Restroom: By the pavilion (about a 5-minute walk from hike start) No dogs, please Park Entry Fee: NONE [Park map](https://www.fairfaxcounty.gov/parks/sites/parks/files/Assets/documents/waterfront/lakeaccotink/lake-accotink-brochure-map.pdf) * NOTE: Alternate directions if you are coming to the Park from the direction of Tysons Corner on 495 (Beltway): You may enter the Park at an entrance on Heming Ave. From I-495, take Exit 54 East onto Braddock Road (east). From Braddock Road, turn right onto Heming Ave., then right into the parking lot for Lake Accotink Park. HOWEVER, you cannot drive from that parking lot to the hike starting place. The two parking lots are connected by a paved walkway through the Park. It's a short walk down the hill to the lake (passing restrooms at pavilion), and then follow road to the dam. Please allow 10 extra minutes once you park to find your way and to walk to the dam if you arrive that way.

## Details Hello everyone! We climb at Crystal City Movement every Wednesday. Please read rest of the description carefully. We mostly do tope rope climbing but we can arrange bouldering sessions as well. If you prefer lead climbing please post on the comments to find your belay partner. FYI we have a group of 5-7 regulars that don’t rsvp anymore, so please still come even if it says no-ones attending. \#\# Requirements * If you are not a Movement member, you'll get a daily pass. If you don't have the equipments you can rent them in the gym. * Please sign the waiver through: [https://movementgyms.com/waiver/](https://movementgyms.com/waiver/) All skill levels are welcome! If you are totally new to climbing and want to do top rope, then you have to have a belay certificate. In order to do that; * You can check Movement gym Intro to Rope Climbing class : [https://movementgyms.com/crystal-city/climbing/classes/](https://movementgyms.com/crystal-city/climbing/classes/) * After the course, you should do the 'Belay Check' which can be done as soon as 24 hours after you take the class. The test takes around 15 mins so it can be done before the climbing session. Before your first visit you may want to check the related webpage: [https://movementgyms.com/first-visit/](https://movementgyms.com/first-visit/) \#\# Where to meet To find us go down the stairs in front of the front desk. We will meet around the benches next to climbing walls.

What if the best product requirement was a working prototype? Amazon built an empire on one principle: start with the customer and work backwards. Identify the durable need. Resist building until you know what you're solving - and for whom. Vibe coding doesn't abandon that discipline. It supercharges it. Join us for an in-depth discussion on how natural language becomes structured specs, specs become architecture, and architecture becomes working software - in real time, in the room, on your machine. Whether you're validating a product idea or accelerating a team's delivery, this is where the “Working Backwards” mindset meets the AI-native development stack. **Featured speaker:** * [AJ Bubb](https://www.linkedin.com/in/ajbubb/), Innovation Strategist and AWS veteran - for a hands-on session exploring Spec-Driven Development with AWS Kiro. \~ "*We're not just talking about it. We're building with it*!" **Location:** AWS Skills Center, 1550-G Crystal Dr, Arlington, VA 22202 **Drinks and Networking After:** Tacombi, 1550 Crystal Dr, Arlington, VA 22202 **Description:** Join us at AI Innovators Network for our upcoming meetup in the Mosaic, which is dedicated to exploring the latest trends in Artificial Intelligence. Whether you're an AI enthusiast, a professional, or someone curious about the intersection of technology and AI, this event is perfect for networking, learning, and sharing insights. Connect with like-minded individuals from DC, Northern Virginia, and Maryland as we dive deep into the opportunities and challenges of integrating AI. Don't miss this opportunity to be part of the conversation driving innovation and progress in Artificial Intelligence.

Join PSW Science® on April 24 at 8 PM as we welcome Harris Lewin, Research Professor with Julie Ann Wrigley Global Futures Laboratory & Arizona State University. During the question and answer period, in-person attendees and live stream viewers may ask the speaker questions, and in-person attendees may also engage with the speaker during the post-lecture reception. Refreshments are served. For more information on this meeting, please visit: https://pswscience.org/meeting/2535 The meeting will be held in the John Wesley Powell Auditorium, adjacent to the Cosmos Club. The Powell Auditorium is located at 2170 Florida Avenue, NW Washington, DC 20008. Use of the Cosmos Club is restricted to the Powell Auditorium, the entryway to the auditorium, and the restrooms immediately outside the auditorium. Please note there is no onsite parking available. PSW Science, founded in 1871, is one of the oldest scientific societies in Washington D.C. Now, over 150 years later, we celebrate the Society's rich history and contributions to scientific discovery and cross-disciplinary collaboration. For information on how to become a member of PSW Science and membership benefits, please visit https://pswscience.org/join/

**Deep Learning Adventures** and the larger **Data Community DC** are thrilled to collaborate with **www.compiled.sh** by **Transpose Platform** and co-organize the largest AI hackathon event in DC so far! We are excited to collaborate with Truc Phan as well as Jeff Hale and Will Angel to make this large scale effort a reality. If you are an AI enthusiast, builder, product manager, UI/UX designer, student or simply enjoy using AI tools effectively, this event is made for you! We are looking for talented individuals and teams to showcase their skills and build awesome products during our hackathon event. There are significant monetary ($5K+) and swag prizes for you as well as direct feedback from selected **Y Combinator** startups. Join us today!!! PLEASE RSVP ON LUMA: [https://luma.com/bmabw4qr](https://luma.com/bmabw4qr) If you have any questions feel free to reach out directly! Thank you, **George Zoto, Truc Phan**, **Deep Learning Adventures** and **Data Community DC**

• What we'll do On https://blackecon101.podbean.com/ Thursdays at 6 pm. discussing the economy....

This Happy Hour is devoted to professionals in the Green, Sustainable Energy and Environment; to grow, interact, and learn from each other. It is designed to provide a professional environment to meet other professionals to broaden one's career. It is also for those interested in careers in the sector and are studying or intend to enter the dynamic world of green movement. ***GRAB A BOOZE OR A BITE AND YOU WILL BE SET TO ENJOY THE EVENT. YOU NEED TO GET AT LEAST A DRINK OR FOOD:) To get the event going and show support. We know that you like our events. P.S. : We have non-alcoholic drinks as well.*** We have a tiny venue and we hit capacity often and early arrival is suggested. We have the discretion to decide entry. HOW IT WORKS : We will try to assign areas for each represented INDUSTRIES AND SPECIALIZATIONS; and will direct attendees to their respective tables accordingly. All are welcome! However we don't guarantee the availability of a partner in that particular experience, you would like to exchange. Space is limited and advance ticket purchase is required. PLEASE BRING A BUSINESS CARD. Rules to abide : 1. Event is free and 21+ (bring ID). 2. Be respectful to your counterparts and give them a chance to connect with others as well. 3. We all are professionals in one or two fields and be willing to share your knowledge and experience to others and try to accommodate as much as possible. 4. If you don't belong the other person's required specialization, LEAVE THEM ALONE. 5. Rude or aggressive members are removed from the group at an organizers discretion. 6. This is a face-to-face networking event. DO NOT try to arrange an online meeting, by using the comment box or direct message. 7. Most of our members complained about people writing in the comment box. Since it sends notification to all attendees. If you have any questions, send a message to the organizers. Don't write in the comment box. 8. We have ZERO TOLERANCE for solicitation. We don't allow anyone to run their own agenda at the Event. If you are interested to promote/sponsor/collaborate; contact us via (info@merevents.com). 9. When you get there, we will greet you and take you to your respective group. 10. ***Please be patient for the first 30 minutes, up until we form a group with your respective industry/sector.*** ***AFTER THE SOCIAL, WE HIT THE DANCE FLOOR! BRING YOUR DANCING SHOES, WE WILL DANCE THE NIGHT AWAY!*** \- Come one\, come all; YOU CAN FLY SOLO TOO:\) This is the most friendliest event you have ever attended\! \- Feel free to invite your friends\. They don't necessarily have to be a member \- Celebrate your birthdays or your moments in life with us\. \- For bottle/table service email \(info@[merevents.co](http://merevents.co/)m) or text at (202) 368-1878. \- Event is 21\+ ***N.B. : We have ZERO TOLERANCE for solicitation. We don't allow anyone to run their own agenda at the Event. If you are interested to promote/sponsor/collaborate; contact us via ([info@merevents.com](http://info@merevents.com/)).*** http://photos1.meetupstatic.com/photos/event/a/1/d/1/600_443321425.jpeg http://photos2.meetupstatic.com/photos/event/d/3/2/b/600_449154059.jpeg http://photos1.meetupstatic.com/photos/event/3/e/7/a/600_448335994.jpeg http://photos1.meetupstatic.com/photos/event/e/0/2/6/600_448197382.jpeg http://photos1.meetupstatic.com/photos/event/d/d/1/7/600_448196599.jpeg http://photos2.meetupstatic.com/photos/event/3/2/8/e/600_434712942.jpeg http://photos4.meetupstatic.com/photos/event/3/2/9/a/600_434712954.jpeg http://photos4.meetupstatic.com/photos/event/8/1/d/0/event_14553232.jpeg

Have you seen the movie “**The AI Doc**: Or How I Became an Apocaloptimist” and are left with questions and thoughts that you're longing to express? A group of friends went to see this documentary and couldn’t stop thinking or discussing about it. Now we want to hear from more people who have seen the movie! Come share your thoughts about AI and the world. **NOT from a technological perspective but where our future lies ahead**. We will start from the key **questions** asked in the documentary, including but not limited to: \- Is it the worst or best time to be born now\, at the age of AI? \- Are you an apocaloptimist or pessimist? \- Did anything in the film challenge your previous beliefs about AI? \- Do you think AI will reduce or worsen inequality? \- What can we\, as the general public\, do to ensure AI safety? 💡Disclaimer: We aim to create a thoughtful, open, and respectful space for sharing ideas. You may encounter perspectives that differ from your own—and that’s part of what makes these conversations meaningful. Sometimes, it’s through contrasting viewpoints that the most interesting insights emerge. We encourage everyone to listen with curiosity and engage with respect. 📍We'll be meeting at Conference Room 2 at West End Library near Foggy Bottom.

**☕ Code & Coffee \| Black Code Collective** Pull up, plug in, and enjoy some good company. Join us for a chill Sunday coworking session — bring your laptop and your current project (or no project at all). All skill levels welcome. **Free to attend. Coffee & treats provided. Just show up.** 📅 **Sunday, April 26** 🕙 **10:30 AM – 12:30 PM** 📍 **Falls Church, VA** Please note that we would be located on the 5th floor with the listed address below. 105 W Broad St, Suite #410 · Falls Church, VA 22046

Walk for Children - 2026 Save Soil Walkathon in Columbus 🌍 Over 52% of the world soil is degraded and scientists warn we may have only a few decades of fertile soil left. As Sadhguru shares, soil is a living system—and when it degrades, our food, health, and future are at risk. https://www.youtube.com/watch?v=hyT-6qiubd0 🚶‍♂️🌎This Earth Day, Join the Walk for Children-2026 SaveSoil 5K Walkathon here in Columbus and help raise awareness about soil for the future of our children! Every step you take helps: ✔️ 1. Raise awareness in your communities about protecting and restoring soil. ✔️ 2. Supports sustainable food systems. ✔️ 3. Helps secure our children’s future. 📅 Date: April 26, 2026 📍 Location: Scioto Audubon Metro Park Check-in address 400 W Whittier St, Columbus, OH 43215 ⏰ Time: 8:30 a.m. check-in event starts at 9:30 a.m. 👉 Register here: https://www.eventbrite.com/e/walk-for-children-2026-save-soil-walkathon-in-columbus-registration-1986596534713?aff=oddtdtcreator 👉🏼Free and Open to All. Share this message and bring your neighbours, friends & family along to celebrate our planet! Let’s make it happen!

Main Library, Meeting Room 2B Join us for a welcoming evening of reflection, gentle music, and meaningful conversation. We’ll begin with a short grounding moment, followed by a brief reading from spiritual or philosophical traditions, and an open reflection circle where participants can share (or simply listen). Libera Animae is an interfaith community focused on inner growth, creativity, and authentic connection. All backgrounds are welcome.

5th annual Earth Day Celebration! This year (2026) the Celebration is scheduled for April 25th with activities running from 10am-2pm. This is a non-ticketed event. Everyone is welcome! We will have food trucks, Birds of Prey, kids crafts, live music, raspberry plants, apple trees, and of course NATIVE PLANTS! Where: Lynd Fruit Farm, 9399 Morse Rd, Pataskala Ohio 43062 Time: Activities will be from 10am- 2pm. The Market will remain open until 5pm.

**❤️‍🔥 Online Speed Dating via Zoom – Connect with Columbus Singles Tonight!** Online speed dating for Columbus locals — hosted live on Zoom, personality matched. Join from home, get paired with Columbus singles your age, and have real conversations on Zoom. A host manages everything so you can just relax and enjoy. **Register under your age group:** - **Ages 18-32** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Columbus&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=18-32&face_v=8.0) - **Ages 30-46** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Columbus&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=30-46&face_v=8.0) - **Ages 40-58** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Columbus&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=40-58&face_v=8.0) - **Ages 55+** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Columbus&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=55+&face_v=8.0) **⚠️ Your RSVP doesn't guarantee a place.** Click your age group link below, register, and take the personality quiz to lock in your spot. Limited places. --- 🎯 **Perfect for:** - Singles in Columbus who want to meet people from home - People fed up with swiping who want actual conversation - Busy professionals who don't want to waste evenings - Anyone who likes connecting online before meeting face-to-face - Columbus locals after personality-matched dates **Event Details** - **Format:** Hosted on Zoom – one-on-one video dates - **Location:** Wherever you're comfortable – no venue, no travel - **Host:** Live host handling rounds and introductions - **Vibe:** Friendly and relaxed – genuine chats with Columbus locals - **Duration:** Roughly 90 minutes - **Rounds:** Multiple short one-on-one rounds - **Matches:** Mutual matches sent out after the event - **Privacy:** Contact info only shared when both match **How It Works** 1. **Pick your age group** – Register through your link above. 2. **Fill in the matching quiz** – Helps us find your ideal matches for the evening. 3. **Join on Zoom** – Click the link, jump on, and the host handles the rest. 4. **Speed date** – One-on-one rounds with personality-matched Columbus locals. 5. **Get matches** – Mutual matches shared after the event. 💡 **Tip:** Just be yourself. That's always the best approach. **Frequently Asked Questions** **Is my info private?** Absolutely. Contact details are only exchanged on mutual match. **What if I'm shy?** The virtual setting and hosted rounds keep things comfortable for everyone. **How long are the chats?** A few minutes each — just enough to get a sense of someone. --- ✨ Real people, real conversations — all from your home. 💘 ✨

**💓 Detroit Virtual Speed Dating – Hosted, Curated & on Zoom** Speed dating from home — connect with real Detroit singles on Zoom. Join from home, get paired with Detroit singles your age, and have real conversations on Zoom. A host manages everything so you can just relax and enjoy. **Register under your age group:** - **Ages 18-32** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Detroit&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=18-32&face_v=8.0) - **Ages 30-46** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Detroit&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=30-46&face_v=8.0) - **Ages 40-58** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Detroit&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=40-58&face_v=8.0) - **Ages 55+** → [REGISTER HERE](https://tempodating.com/product?productId=430.0&productType=onlineSpeedDating&city=Detroit&groupurlname=heartfelt-connections-for-local-singles-meetups&ar=55+&face_v=8.0) **⚠️ Heads up — RSVPing here isn't enough.** Register through your age group link below and complete the quiz. Capacity is limited. --- 🎯 **Perfect for:** - Singles in Detroit who want to meet people from home - Singles who prefer a hosted, structured experience - People fed up with swiping who want actual conversation **Event Details** - **Format:** Virtual on Zoom – hosted and well-structured - **Location:** From home – all you need is Wi-Fi and a webcam - **Host:** Friendly host guiding every round - **Vibe:** Great energy, real people, authentic conversation **How It Works** 1. **Pick your age group** – Register through your link above. 2. **Fill in the matching quiz** – Helps us find your ideal matches for the evening. 3. **Hop on Zoom** – Join the call and your host will walk you through it. 4. **Speed date** – One-on-one rounds with personality-matched Detroit locals. 5. **Results** – We'll send your mutual matches afterwards. --- ✨ Speed dating from home — easy, fun, and personality matched. 💖 ✨