Understanding the human body is a team effort. That's where the Yachtel group comes in.

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This is Scientific American's 60-second science.

I'm Christopher in Talatata. Got a minute?

When you think endangered species, which come to mind? Tigers, pandas, gorillas? I'm guessing

what probably does not are Hawaiian land snails. Yet a new analysis in the journal conservation

biology suggests that some 95% of known Hawaiian

landsnails in the Amastridi family could already be gone.

So that's a horrible level of extinction.

Robert Cowie, a biologist at the University of Hawaii.

Kaui and his colleagues came up with the 95% figure by convening the world's foremost experts

on Hawaiian landsnails,

that is, the dozen or so scientists and naturalists who study the creatures.

Through a series of interviews and hundreds of field surveys of the islands, they took

the best guess as to whether each of the 325 documented species in the Amastardy family

still existed. They think only 15 are still alive,

leaving 310 in the probably extinct category. Now there is an organization that officially counts

this stuff, the International Union for Conservation of Nature. But the union lists only 33 of the

...