What are the biggest unknowns about the asteroid impact and extinction event that wiped out non-avian dinosaurs? 🦖☄️ In this video, Dr. Rachel Phillips (aka: Geo Girl) takes us through 6 of the biggest mysteries that remain about this event and the research working toward solving these mysteries that she learned about on a recent GSA Field Trip. Participants not only got to visit outcrops of the KPg boundary in Texas but also the Gulf Coast Core Respository at Texas A&M! If you'd like to go on

Bennu, an ancient and rocky near-Earth asteroid about 550 yards (about 500 meters) wide. Asteroids like Bennu are made of material from the earliest days of the solar system. When NASA’s OSIRIS-REx spacecraft arrived at asteroid Bennu in December 2018, its close-up images confirmed what mission planners had predicted nearly two decades before: Bennu is made of loose material weakly clumped together by gravity, and shaped like a spinning top. This major validation, however, was accompanied by a m