Moving upstream into Mongolia, we leave behind the woodland wilderness of China's extreme north and Siberia's south to follow the Amur's two westernmost tributaries across the planet's vastest wild grasslands.
Collapse of the Oceans: Joshua Jackson travels to the Great Barrier Reef to see first-hand the effects of climate change on the world's oceans.
Will Smith along with current and former astronauts question why, of all the life on earth, we are the only beings that evolved enough to leave this planet?
World-renowned physicist Stephen Hawking joins Neil deGrasse Tyson for an episode discussing the mysteries of our universe.
In the first episode of season 2, Scientists at IMSFâs outpost on the Red Planet brace for...National Geographic/Dusan Martincek