Top Science Stories Scott speaks with NPR's science correspondent Joe Palca about the year's top news stories in science. They include cloning, space, and Viagra.
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Top Science Stories

Only Available in Archive Formats.
Top Science Stories

Top Science Stories

Top Science Stories

Only Available in Archive Formats.

Scott speaks with NPR's science correspondent Joe Palca about the year's top news stories in science. They include cloning, space, and Viagra.