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Heading for middle age? Bring your sneakers to cut breast cancer risk

For women past childbearing age, a new study finds that a modest amount of exercise -- four hours a week of walking or more intensive physical activity such as

How the Great Barrier Reef is responding to global warming. (Hint: not well)

A detailed analysis of the Great Barrier Reef over the past two decades shows that extreme heat is the key driver of mass bleaching. Rising temperatures may push the reef beyond recovery.

Here's what gives kingsnakes the edge in snake-to-snake combat

Nature draws a pretty clear distinction between predators and the things they eat: Predators are bigger than their prey. Except no one told the kingsnake.

New view of dinosaurs could radically reshape their family tree

The dinosaur family tree may need to be radically rewritten — and even uprooted and replanted elsewhere, a new analysis shows.

Why would beetles want to look, act and smell like army ants? To eat them, of course

These parasitic beetles infiltrate colonies of army ants. They look, act and smell like their hosts, but it's all a ruse to eat the ants' young.

Ancient relative of crabs, shrimps and lobsters is named in honor of David Attenborough

Scientists have discovered the fossil remains of a 430-million-year-old crustacean previously unknown to science – a proto-shrimp that they’re naming in honor of naturalist David Attenborough.

Having a common cold feels worse if you're lonely

Sometimes, life kicks you when you’re down. According to new research, that crummy, achy, sneezy feeling you get when you have a cold is worse if you are also feeling lonely.

Biology explains why men kill big game like Cecil the lion — and how that behavior might be stopped

Why do some humans engage in expensive ventures to hunt lions, elephants and other big-game species that often are endangered or otherwise threatened? The cost is exactly the point.

Would you deliver an electric shock at someone's orders? A new take on the Milgram experiment shows the answer is likely still yes

Caught between the power of an authority figure and our own qualms, we are more often creatures of expectation than we are creatures of personal conviction.

Natural Brexit: Britain's original separation from Europe left scars on English Channel

Natural Brexit: Nearly 450,000 years ago, Britain was separated from Europe thanks to a series of catastrophic waterfalls

How did Mars lose so much of its atmosphere? MAVEN has an answer

NASA's MAVEN spacecraft has found that Mars likely lost much of its atmosphere to space, thanks to a young, rambunctious sun.

Even in choosing science books, Americans seem divided by politics

When Americans buy science books, their political leanings tend to show, study finds

Trump’s budget plan for NASA focuses on studying space, not climate change

NASA missions to the surface of Europa, a nearby asteroid and the atmosphere above our own planet would be cut from JPL’s portfolio under the White House budget proposal released Thursday.

Dying patients want easier access to experimental drugs. Here's why experts say that's bad medicine

For all its populist appeal, the push for "Right to Try" laws has raised the ire of ethicists, drug-safety experts and a former FDA commissioner.

This night owl gene mutation turns people into sleep Martians

Researchers have found a genetic mutation that turns people into Martians — at least when it comes to sleep patterns. NBC News reports.

Six charts show where the Trump White House is wrong on coal

EPA chief Scott Pruitt suggests regulations are behind coal's falling share of U.S. electricity generation, but most analysis points to a natural gas boom.

Coal can be more profitable and efficient going forward, expert says

President Donald Trump vowed to end the war on coal on Tuesday, and that's good news for coal stocks in the near term, energy expert Carl Larry told CNBC.

New EPA chief plans 'humble' approach to regulating CO2 emissions

The Environmental Protection Agency will take a less aggressive approach to carbon dioxide emissions than in the past, Scott Pruitt said on Tuesday.

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