Watch NOVA scienceNOW Season 3 Full Episodes

T-Rex Blood? - Preserved soft tissue, including possible blood vessels and red blood cells, are turning up in dinosaur fossils. Epigenetics - Our...

Asteroid - Will a doomsday rock the size of the Rose Bowl hit Earth in 2036? Island of Stability - Follow the decades-long quest to create the...

Mass Extinction - What caused the mother of all extinctions 250 million years ago? 1918 Flu - A virus that killed up to 50 million people is brought...

Aging - Will research into "longevity genes" help us live longer and healthier lives? Space Elevator - Can we build a 22,000-mile-high cable to...

Phoenix Mars Lander - NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life. Brain...

Leeches - A century after falling out of favor, medicinal leeches are back in hospitals, sucking away on patients' wounds. SETI - Astronomers have...

Bird Brains - Clues to the origins of human language are turning up in the brains of birds. Space Storms - Behind the dazzling display of the aurora...

Saving Hubble - Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope. First Primates - Our most distant...

Personal DNA Testing - Genetic testing to assess risk factors for a handful of serious illnesses is now commercially available. But is it a good...

Dark Matter - Turns out most of the universe is held together by a mysterious, invisible substance. Of Mice and Memory - Mice placed in enriched...