Watch NOVA scienceNOW - Season 3 Episode 4

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Episodes — Season 3
#	Title	Watch
1	Dark Matter, Mice, Crowd Wisdom	Play
2	Personal Genome; Digital Art Authentication; Carbon Sequestration; Pardis Sabeti Profile	Play
3	Saving Hubble, First Primates, Iraqibacter	Play
4	Bird Brains, Space Storms, Smart Bridges	Playing
5	Leeches; SETI; Stem Cells; Edith Widder	Play
6	Phoenix; Mammoth Mystery; Judah Folkman Tribute	Play
7	Aging, Space Elevator, Maya from Space	Play
8	Mass Extinction, 1918 Flu, Papyrus	Play
9	Asteroid, Island of Stability, Karl Iagnemma	Play
10	T-Rex Blood, Epigenetics, Kryptos	Play