Dark energy makes up 70% of the Universe and accelerates its expansion, yet its true nature remains unknown. Historical perspectives from Newton to Einstein shaped our understanding of gravity and …

Katie Mack is a theoretical astrophysicist and science communicator best known for her exploration of cosmic endings in The End of Everything (Astrophysically Speaking). Dr. Mack examines how the universe might ultimately end—through scenarios such as the Big Crunch, Heat Death, Big Rip, vacuum decay, and other cosmological possibilities—using cutting-edge physics and observational science. With clarity, wit, and rigor, she makes complex ideas about dark energy, quantum fields, and cosmic evolution accessible, inviting audiences to confront profound questions about time, existence, and humanity’s place in an ever-changing universe.

The Dark Energy Survey Collaboration collected information on hundreds of millions of galaxies across the Universe using the U.S. Department of Energy-fabricated Dark Energy Camera, mounted on the U.S...