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'Mad Science' Looks At Groundbreaking Inventors

You may not know that the traffic signal, the firehouse pole, and instant coffee were all invented by people of color. The stories behind those inventions and many more are included in the new book, Mad Science. Editor Randy Alfred speaks with guest host Celeste Headlee.

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.

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.

4 Reasons Mormons Are More Skeptical Of Trump Than Other Religious Conservatives

White evangelicals are some of Trump's strongest backers. But another reliably Republican group of Christians — Mormons — is leery of the GOP candidate. Here's why.

AT&T Deal For Time Warner Casts Renewed Attention On CNN

AT&T's chief promises to maintain CNN's journalistic independence after parent Time Warner merges with the telecom giant. CNN got a $100 million boost this year, propelled by coverage of Donald Trump.

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