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Watch the complete July 9, 2008 broadcast of NOVA scienceNOW here. To watch any of our segments from past episodes online, go to past stories.

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Running time: 2:09

Saving Hubble

Saving Hubble

Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.
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First Primates

First Primates

Our most distant primate ancestors, which took the stage shortly after the dinosaurs left it, were tree-dwellers the size of mice.
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Profile: Alfredo Quiñones-Hinojosa

Profile: Alfredo Quiñones-Hinojosa

He jumped the fence from Mexico to work as a farmhand and ended up a leading brain surgeon.
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Killer Microbe

Killer Microbe

A relatively benign bug becomes a highly lethal pathogen, known to U.S. soldiers as Iraqibacter.
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