NPR News: Fire-making materials at 400,000-year-old site are the oldest evidence of humans making fire

Fire-making materials at 400,000-year-old site are the oldest evidence of humans making fire
Archaeologists in Britain say they've found the earliest evidence of humans making fires anywhere in the world. The discovery moves our understanding of when humans started making fire back by 350,000 years.

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NPR News: Colorado ranchers say wolves are killing livestock. The state is stepping in to help

Colorado ranchers say wolves are killing livestock. The state is stepping in to help
Two years after residents voted to reintroduce wolves in Colorado, ranchers there say too many of their cows are being killed. The state is now hiring people on horseback to help.

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NPR News: Oldest evidence of human fire-making unearthed in Britain

Oldest evidence of human fire-making unearthed in Britain
A new study suggests humans were deliberately starting and using fires more than 400,000 years ago.

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NPR News: What to know about death cap mushrooms, blamed for poisonings in California

What to know about death cap mushrooms, blamed for poisonings in California
Death cap mushrooms look harmless, but are responsible for the majority of the world's mushroom-related deaths. California officials say 21 people have been sickened in recent weeks, one fatally.

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NPR News: Scientists have calculated just how much faster clocks tick on Mars

Scientists have calculated just how much faster clocks tick on Mars
Clocks tick faster on Mars than they do on Earth, in part because Mars experiences less gravitational pull from the Sun. Now scientists have calculated just how much faster -- 477 microseconds, on average.

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NPR News: Black bear populations are bouncing back. Here's how these Texas towns are coping

Black bear populations are bouncing back. Here's how these Texas towns are coping
Historically, Black bears were the biggest predator to travel the Big Bend area of Texas. But overhunting and habitat loss led to their decline.

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NPR News: How many species are on Earth?

How many species are on Earth?
There are roughly 2.5 million known species on the planet, but scientists estimate that's only a fraction of the biodiversity on Earth. A new study shows we're finding new species like never before.

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