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A reconstruction of the head of <em>Paranthropus boisei</em>, based on a skull found at Olduvai Gorge, Tanzania, in 1959 by Mary Leakey. Initial analysis of the skull and fossilized teeth led scientists to think this ancestor ate nuts. More advanced analysis in later years revealed that a more diverse diet that included grasses.

Dental Detectives: What Fossil Teeth Reveal About Ancestral Human Diets

From the thickness of tooth enamel to the molecular signatures on a tooth left behind by foods eaten by a human, fossil teeth hold many clues to the diets of our ancestors.

The window seat may be a safer spot for small children than along the aisle. Plus there's the view.

For Babies On A Plane, Hot Drinks And Co-Sleeping Pose A Risk

Airplanes are a remarkably safe way to travel, but small children can be injured while aloft. Skipping the hot coffee and putting small ones in the window seat can help, pediatricians say.

WATCH: Obama Reads 'Mean Tweets' — Including One From Trump

President Obama returned to ABC's Jimmy Kimmel Live on Monday. He took 140-character admonishments for his dancing, his alleged condiment preferences and someone else's poor choice of conditioner.

Watch Andrew Bird And The National's Matt Berninger Cover Lou Reed's 'Perfect Day'

The intimate, completely unadorned performance was recorded live in Andrew Bird's living room as part of his ongoing "Live From The Great Room" home recording series.

Progressive Field, home of the Cleveland Indians, is set up for Game 1 of the World Series against the Chicago Cubs on Tuesday night.

Indians Or Cubs, The World Series Will Put An End To One Team's Drought

Even before tonight's opening pitch, the mere fact that these two teams have made it this far is historic in itself. The Indians last won a championship in 1948, and the Cubs haven't won since 1908.

Linguist Geoff Nunberg argues that the media's decision to bleep or otherwise block out a particular word can result in concealing information the public needs to know.

Not Fit To Print? When Politicians Talk Dirty, Media Scramble To Sanitize

Donald Trump isn't the first politician to use coarse language, but linguist Geoff Nunberg says the 2005 Access Hollywood tape of him discussing women's genitalia wasn't like other live-mic incidents.

Rigging An Election? It's Not So Easy, Voting Law Expert Says

Rick Hasen, founder of the Election Law Blog, discusses Donald Trump's claims of potential voter fraud. "He's threatening the bedrock of democracy, and doing it to claim he's not a loser," Hasen says.

Many Republicans now think that Missouri Democratic Senate candidate, Secretary of State Jason Kander, will prevail over Republican Sen. Roy Blunt.

Two Weeks Out: Democrats Have The Edge In The Fight For The Senate

States like Pennsylvania, New Hampshire, Missouri and North Carolina will be decisive, and they're all moving Democrats' way as Republicans are put further on the defensive by Donald Trump.

Members of the Three Percent United Patriots assemble in Arizona near the U.S.-Mexico border. It is one of about 275 militia groups in the U.S.

What A Reporter Learned When He Infiltrated An Arizona Militia Group

Going on patrol along the U.S.-Mexico border with the Three Percent United Patriots — amped up and equipped with night vision goggles — felt like going to war, says journalist Shane Bauer.

The U.S. Capitol on October 11, 2016. An MIT project distorted photos of the capitol building and other famous sites using an artificial intelligence algorithm to make horror images.

Researchers Build 'Nightmare Machine'

An MIT project rolled out just in time for Halloween uses artificial intelligence to generate horror images.

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