SciShow on Instagram: "Sometimes, being an expert in one scientific field doesn’t translate to another. But then there’s Luis Alvarez, a particle physicist who helped expand our knowledge of the world by investigating everything from atomic bombs, to Egyptian pyramids, to what actually killed the dinosaurs. This video was inspired by Collisions: A Physicist’s Journey from Hiroshima to the Death of the Dinosaurs, a new book by Alec Nevala-Lee. If you’d like to check it out, head to the SciShow Bo

Galaxies on Instagram: "When a nuclear reactor first powers on, it glows with an otherworldly blue light, one of the rarest sights on Earth. That glow is called Cherenkov radiation, a phenomenon that occurs when charged particles travel through water faster than light can move in that same medium. It’s not the light of fire, but of pure energy breaking a physical boundary. First discovered in 1934 by Russian physicist Pavel Cherenkov, the effect was later explained by Ilya Frank and Igor Tamm, e