NASA on Instagram: "What's it like to float through the International Space Station? For more than 25 years—since Nov. 2, 2000—humans have been living and working on the @ISS. More than 290 people from 26 countries have visited the station; their work and scientific research is helping us learn how to live in space (and prepare for missions to the Moon and Mars) while making life better back on Earth. As we celebrate this milestone, we've released a new 15-minute tour of the station; follow alon

Memes on Instagram: "Real Quantum Gravity and the Unification of Physics Modern physics rests on two pillars that are both extraordinarily successful—and fundamentally incompatible. Quantum mechanics governs the smallest scales of reality, describing particles as probabilities and interactions as quantized events. General relativity, on the other hand, explains gravity as the smooth curvature of spacetime itself, excelling at cosmic scales. Each theory is correct within its domain, yet when forc