Dr Katherine (Katie) Mack is a theoretical astrophysicist and assistant professor of physics at North Carolina State University. Her research has focused on dark matter, the early universe, galaxy formation, black holes, cosmic strings, and the ultimate fate of the cosmos. Dr. Mack's latest book, "The End of Everything (Astrophysically Speaking)" discusses five universe-ending possibilities proposed by cosmologists and what that grand finale would look like.
Dr. Katie Mack explains what dark energy is and two ways it could one day destroy the universe.
The expansion of the universe is speeding up—contrary to what many physicists expected. A "heat death" is coming, but it's not what you think.