Whether you're traveling or not, learn the science of solar eclipses before the next hits North America August 21st http://on.natgeo.com/2h06sJ8

Whether you're traveling or not, learn the science of solar eclipses before the next hits North America August 21st http://on.natgeo.com/2h06sJ8 

https://twitter.com/NatGeoTravel/status/889908251957055488