Escapes from Apathy
kardaan:
Tatiana Platon
ultrafacts:
(Fact Source) for more facts, follow Ultrafacts
trigonometry-is-my-bitch:
Non circular planetary gears
Video demonstration: [x] (Fact Source) for more facts, follow Ultrafacts
Video demonstration: [x]
pvoland:
NORTH KENYA
transitofvenus:
Zooey Deschanel
fnhfal:
War in Ukraine
Escapes from Apathy 