For as long as Hank has hosted Crash Course, he's wanted to host a series about the history of science. We've been asking big questions for a really...
Ufikiaji Bure wa Ukomo, Tafuta chochote Hakuna Matangazo, Mamilioni ya vyeo na kuongezwa kila siku, Majukwaa yote na Optimized Kikamilifu, Mahali popote na wakati wowote