Two previous investigations disagreed about what’s behind the tomb walls. Now scientists are launching an all-out effort to solve the mystery. http://on.natgeo.com/2BTdq7M

Two previous investigations disagreed about what’s behind the tomb walls. Now scientists are launching an all-out effort to solve the mystery. http://on.natgeo.com/2BTdq7M 

https://twitter.com/NatGeoTravel/status/959924509812936705