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NOVA scienceNOW•Season 3•Episode 5

Leeches; SETI; Stem Cells; Edith Widder

Jul 23, 2008

Leeches - A century after falling out of favor, medicinal leeches are back in hospitals, sucking away on patients' wounds. SETI - Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there? Stem Cells Breakthrough - Three separate teams overcome

Previous episodeE4 · Bird Brains, Space Storms, Smart Bridges Next episodeE6 · Phoenix; Mammoth Mystery; Judah Folkman Tribute

Seasons6

All 1 2 3 4 5 6

Season 3 Episodes10

Dark Matter, Mice, Crowd Wisdom

Personal Genome; Digital Art Authentication; Carbon Sequestration; Pardis Sabeti Profile

Saving Hubble, First Primates, Iraqibacter

Bird Brains, Space Storms, Smart Bridges

Leeches; SETI; Stem Cells; Edith Widder

Phoenix; Mammoth Mystery; Judah Folkman Tribute

Aging, Space Elevator, Maya from Space

Mass Extinction, 1918 Flu, Papyrus

Asteroid, Island of Stability, Karl Iagnemma

T-Rex Blood, Epigenetics, Kryptos

Cast4

Neil deGrasse Tyson

Neil deGrasse Tyson

Host

Z

Ziya Tong

Self (Correspondent)

P

Peter Standring

Self (Correspondent)

C

Chad Cohen

Self (Correspondent)

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Episode Summary

"Leeches; SETI; Stem Cells; Edith Widder" is episode 5 of NOVA scienceNOW season 3. It aired on July 23, 2008.

Next: E6 · Phoenix; Mammoth Mystery; Judah Folkman Tribute Best of Season 3