For 5 days after the eruption of Krakatoa, a wave of air pressure swept around the globe. http://j.mp/2a7CyzH http://pic.twitter.com/x70G66Bs6E

— Nautilus (@NautilusMag) July 19, 2016

from http://twitter.com/NautilusMag
on: July 19, 2016 at 10:00AM