Artificial Life (Oct. 2005)

Are scientists on the verge of making living things from little more than dust? Watch now (15 mins.)

Epigenetics (Jul. 2007)

Our lifestyles and environment can change the way our genes are expressed, leading even identical twins to become distinct as they age. Watch now (13 mins.)

Fish Surgery (Oct. 2005)

Veterinary medicine has caught up with Americans' love for their number one choice of pet: the fish. Watch now (6 mins.)

Frozen Frogs (Apr. 2005)

The common wood frog freezes solid every winter and then, come spring, defrosts and mates. Watch now (4 mins.)

Ivory-Billed Woodpecker (Jan. 2006)

An enchanting bird believed extinct mysteriously reappears...maybe. Watch now (7 mins.)

Profile: Bonnie Bassler (Jan. 2007)

Her insight into how bacteria "talk" has launched a revolution in biological and medical research. Watch now (13 mins.)

Profile: Erich Jarvis (Oct. 2005)

The work of neuroscientist Erich Jarvis demonstrates the power of open-mindedness in the lab. Watch now (12 mins.)

Sleep (Jul. 2007)

Why do we need sleep? Part of the answer may be to strengthen memories. Watch now (13 mins.)