caltech.edu

NXAyJ TIL Leonardo da Vinci did detailed experiments to understand the nature of gravity long before Galileo Galilei and Isaac Newton.
M74jW TIL deep within the Earth lies the remains of a planet that crashed into it billions of years ago.
8aXPK TIL when Kaiser Wilhelm abdicated the throne in 1918, Einstein wrote in his journal “[Lecture] cancelled due to revolution."