Ethan SiegelinStarts With A Bang!Why do we count the Universe’s age from 13.8 billion years ago?The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?1h ago1h ago
Ethan SiegelinStarts With A Bang!If the Big Bang wasn’t the first thing ever, what caused it?Many contrarians dispute that cosmic inflation occurred. The evidence says otherwise.3d ago53d ago5
Ethan SiegelinStarts With A Bang!Is it true that photons truly live forever?In all the Universe, only a few particles are eternally stable. The photon, the quantum of light, has an infinite lifetime. Or does it?4d ago134d ago13
Ethan SiegelinStarts With A Bang!The Hubble tension: still unresolved, despite new measurementsThe big question isn’t whether the Universe is expanding at 67 or 73 km/s/Mpc. It’s why different methods yield such different answers.5d ago75d ago7
Ethan SiegelinStarts With A Bang!Relativity: the oldest physics principle that’s still correctThe original principle of relativity, proposed by Galileo way back in the early 1600s, remains true in its unchanged form even today.6d ago86d ago8
Ethan SiegelinStarts With A Bang!Our cosmic home is typical for stars, but not for galaxiesMost stars in the Universe are located in big, massive, Milky Way-like galaxies. But most galaxies aren’t like ours at all.Aug 196Aug 196
Ethan SiegelinStarts With A Bang!Ask Ethan: Could we build a collider bigger than Earth?The largest particle accelerator and collider ever built is the Large Hadron Collider at CERN. Why not go much, much bigger?Aug 166Aug 166
Ethan SiegelinStarts With A Bang!3 big lessons from Einstein’s most famous equation: E=mc²More than any other equation in physics, E = mc² is recognizable and profound. But what do we actually learn about reality from it?Aug 159Aug 159
Ethan SiegelinStarts With A Bang!How a failed experiment led to Einstein’s first big revolutionThe Michelson-Morley experiment of 1887, despite expectations, revealed a null result: no effect. The implications were revolutionary.Aug 149Aug 149
Ethan SiegelinStarts With A Bang!Einstein’s big insight that explained Newton’s law of gravityFor centuries, Newton’s inverse square law of gravity worked beautifully, but no one knew why. Here’s how Einstein finally explained it.Aug 1310Aug 1310