A Brief History of Timekeeping

SciShow explains the complicated and fascinating science behind telling time.

7 Holes in the Space Station

Destin from Smarter Every Day looks into the engineering of one of the most important features of the space station…with help from the actual astronauts!

Tattooing Close Up (In Slow Motion)

Anyone squeamish or afraid of needles need not apply. For everyone else, take a look at what Destin at SmarterEveryDay found out. Tattooing is more scientific than you might think!