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Tiny, Ancient Tree-Dweller Was One Of Earth's Earliest Primates

About 55 million years ago, a teacup-sized critter in China was helping to pave the way for apes and humans. This insect eater had fingernails and stereo vision, a newly published analysis of a fossil suggests. And it weighed just 1 ounce.
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Environmental Outlook: Jellyfish And The Health Of The Ocean

Jellyfish have thrived for hundreds of millions of years, but now scientists are worried they’re doing too well. For this month's Environmental Outlook: What warming waters and overfishing mean for jellyfish and the health of the ocean.


The SciFri Book Club Takes a Hike

The book club regulars gather to chat about the best-sellingA Walk in the Woods, writer Bill Bryson's 1998 account of a hiking trip along the Appalachian Trail. Plus, journalist Deborah Blum joins the club to talk about the best science books to stash in your beach bag (or backpack).

Big-Mouthed Toucans Key To Forest Evolution

As humans have cut into Brazil's forests, the toucan population has taken a dive. The trees, in turn, have changed, too: Without large-billed birds to eat fruit with big seeds, only trees with small seeds thrive. Eventually, one scientist says, "the impacts on the forest could be quite dramatic."

Michigan Tracks Cattle From Birth To Plate

Would you like to know the life history of that steak before you eat it? Technology exists to give you that information, at least in Michigan, where the state government requires all cattle to carry an electronic tag for tracking purposes.

Scientists Say Species Is Earliest Known Bird

The creature has part bird and part reptile traits. An international team says it should now be considered a bird.