The End of Everything (Astrophysically Speaking), with Katie Mackwww.youtube.com Katie Mack is a theoretical cosmologist specializing in the connections between astrophysics and particle physics … so that's the very BIG and the very SMALL. She also works on topics related to the early universe, black holes and the formation of the first galaxies. She's also a well known science communicator. Her 2020 book is called The End of Everything (Astrophysically Speaking) … which begins at the Big Bang and then it delves into some fates for the universe you might have heard of, such as the Big Crunch, heat death and the Big Rip … and much more. A review of this book at EarthSky.org said it was the perfect combination of a little scary and a little amusing. Katie will be speaking with EarthSky's founder and editor-in-chief Deborah Byrd.