About this episode
An unusual hellscape of a planet found 34 light years from Earth has a deep ocean of molten magma surrounded by noxious, hot, rotten egg-type fumes. It just may be the most uninhabitable alien landscape we've ever come across.PLUS:Neanderthal DNA can help explain how human faces formNearly indestructible teeny tiny tardigrades struggle to survive in Martian dirtTiny tags on monarch butterflies allow scientists to track their exact migration routeA weird fish has a big hole in its head. Scientists finally have an idea why.
