Carl Sagan on the future of humanity (1980)…

Why do we measure a complete rotation around the circle as being 360°? [🎞️ Beau Janzen / reason4math]…

The dance of Earth, Jupiter, Saturn, and Uranus around the Sun [🎞️ thebrainmaze]…

Good morning…

Evening view of the Amalfi Coast in Italy.…

Compaq Portable 1983 & Print Master Plus [📹 vitaskhr]…

Polar bear chilling after a lucullian meal. [📹 Martin Gregus]…

Xianren Bridge (仙人桥 lit. 'Fairy Bridge') is a natural arch created by flowing water that has the world's longest recorded span. Carved of limestone karst, the