Environmental Issues

[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).

We do two types of meetups -- Pre-planned topics, which feature a page or two seed discussion, with multiple discussion queue questions, and Category topics, which are a general category, for which members then post specific questions with whatever background is needed to provide context. This meetup is a category topic. We meet in person and online. In person will be at 10113 Seattle Slew Lane. This meetup location does not have sufficient chairs for all of us, so it is advisory to bring a portable chair. The location also does not have food for sale. I will bring several large pizzas, and will request $2/slice. One pizza will be vegetarian. Tap water is available, please bring any other drinks desired. Online will be: [https://teams.live.com/meet/93583191724730?p=hY3jxVvnOciVl2aRn5](https://teams.live.com/meet/93583191724730?p=hY3jxVvnOciVl2aRn5)

*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.

Come out every Wednesday from 6 to 9 to play Flesh and Blood TCG!

\-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LU.MA)!](https://luma.com/pqog5iij) \-\-\-\-\-\- Join us for an evening of collaborative problem-solving as we work on a variety of civic tech projects together. Project needs vary but often include brainstorming, researching, writing, coding, or analyzing data. Check out [our website](https://www.civictechdc.org/projects) for a list of projects which may make an appearance! Meet other civic tech enthusiasts. Learn new skills. Contribute to a project to improve a local civic issue. **All are welcome and collaboration is encouraged.** Laptops are recommended but not required. **Where do I register?** To better serve our growing community, we’re transitioning our event registrations to [Luma](https://luma.com/civic-tech-dc)! **We still love Meetup** Meetup has been an incredible platform for us to build and connect with our community. We’ll continue sharing upcoming events there so that new people can find us, but [Luma](https://luma.com/civic-tech-dc) will be our primary registration platform moving forward. **Why we're making the switch** Meetup’s registration system has some limitations, and we need more flexibility to manage sign-ups and engagement. \-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LU.MA)!](https://luma.com/pqog5iij) \-\-\-\-\-\-

At this event you'll discover how to better understand and control your subconscious mind, helping you overcome doubts and fears. If you have anger issues, depressions and anxieties. this event will show you how to overcome them.

*Beyond Curfews and Toward Real Community Safety*. While youth curfews in DC continue to be pushed in the name of “public safety,” we must shift the focus toward what real safety looks like when communities lead. Instead of policing and punishment, this discussion explores how investing in youth, housing, education, and opportunity can prevent harm at its roots. Grounded in PACA’s vision, this **Assata Shakur Popular Education (ASPE)** session will examine how residents can take decision-making power over safety, resources, and accountability. Together, we will identify concrete steps to move beyond curfews and build community-led, youth-centered systems of care and safety. Food will be provided! *Food will be provided!*