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A Madagascan chameleon and a Scottish water vole travel to secure their bloodline.

Seed plants and amniotes adapt to dry climates, helping them thrive on Pangea in the Permian Period.

Join the mission as the New Horizons spacecraft attempts to fly by NASA's most distant target yet. Since it explored Pluto in 2015, New Horizons is zooming toward Ultima Thule, an object four billion miles from Earth.

This hour-long documentary features photography and original musical compositions by Todd Gustafson that bring striking natural landscapes and the wonders of the wilderness into the comfort of the living room.

New discoveries are revealing that Albert Einstein and Stephen Hawking share a cosmic connection.

Join NOVA for New Horizon’s historic flyby of Pluto, the culmination of the spacecraft’s nine-year, three-billion-mile journey to reveal the first-ever detailed images of this strange, icy world at the very edge of our solar system.

Join Apollo 11 on its historic journey. The film seamlessly blends mission audio featuring conversations among Neil Armstrong, Buzz Aldrin and Michael Collins with new footage, NASA archive and stunning CGI to recreate the first moon landing.

DR. CLIFF: WORLDWIDE VET, part travel diary and part animal health show, follows a remarkable veterinarian as he travels to India to work with local animal rescues, caring for injured and sick pets.

Scientists now link friendship to a remarkable range of benefits—both physical and mental.