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This is Scientific American 60-second science. I'm Emily Schweng.

Somewhere in this forest you hear, there are sloths. Those slots live in Brazil's Atlantic

forest. If you're a tourist watching slots, isn't that exciting. But if you're a scientist,

well, it's also not that exciting,

but there's a big upside. And so they actually, great study animal for the wild, because you can

collect a lot of data on them. Giles Duffield, a biologist at the University of Notre Dame,

who studies circadian rhythms. I mean, the ecology work that I used to do several years back in Bolivia was focused on bird conservation, bird ecology.

And, you know, you'd see some parrots and you'd make some notes, and then they were gone.

You wouldn't see them again for another 24 hours.

But Duffield and colleagues now collect data on the brown-throated, three-toed sloth in the

Atlantic forest. Duffield says the sloths can stay in sight, or even in the same tree, for

nearly 24 hours. The animals are at rest anywhere from 75 to 90% of the time. But they're coping with a damaged ecosystem.

The suggestion is 98% of that forest has been depleted.

There's a lot of human disturbance.

There's obviously roads cutting through these areas of the forest,

and it means the population of fauna and flora is depleted.

According to new research published in the journal Mammalian Biology by Duffield and colleagues,

...