NOVA scienceNOW

Renowned astrophysicist Neil deGrasse Tyson investigates whether a "doomsday asteroid" the size of the Rose Bowl will hit the earth in 2036.

The Kepler telescope; discovering genes for Alzheimer's and autism; using computers to authenticate paintings; profile of Maydianne Andrade.

Two drugs that may aid kids with muscular dystrophy; demise of the dinosaurs; profile of Franklin Chang-Diaz; northern lights.

The science behind our sense of taste; carbon sequestration; evolutionary roots of human language; profile of medical engineer Sangeeta Bhatia.

Rockets to the moon; the oldest known organic molecules on earth; neuronal processes that lead to producing sound; profile of Lonnie Thompson.

The implications of the personal genetic profile; a visit to a Texas algae farm; a journey deep beneath the Arctic Ocean; a profile of roboticist Yoky Matsuoka.

The Hubble repair mission; understanding the link between brain structure and memory; how and why earthquakes strike in the heartland; a profile of neurosurgeon Alfredo Quiñones-Hinojosa.

How and why earthquakes strike in the heartland; the role of sleep in strengthening memories; profile of marine geologist Sang-Mook Lee; and evolutionary evidence of the creatures that evolved into primates.