Very few people have gotten a 100% score so far. Will you join the ranks of the eclipse experts? http://on.natgeo.com/2wKcP6r

Very few people have gotten a 100% score so far. Will you join the ranks of the eclipse experts? http://on.natgeo.com/2wKcP6r 

https://twitter.com/NatGeoTravel/status/895494680783319040