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Research shows that sleep deprivation makes people emotionally volatile and temperamental — a fact that hasn't escaped the notice of some reality TV producers, who deny contestants sleep in an effort to kick up televised drama.

A mastodon tooth washed up on a California beach and then went missing. A local museum tried to track it down.

The Justice Department and the CIA's Inspector General are both investigating the agency's 2005 destruction of videotapes of the interrogations of top al-Qaida operatives. The Justice Department has already started what it calls a "preliminary inquiry" into the matter.

The future of Kosovo again tops the agenda of the United Nations Security Council. The U.N. has been running the region ever since NATO helped end a Serb crackdown on ethnic Albanians there eight years ago. But Kosovo's Albanians are planning to declare independence, a move resisted by Serbia.

U.S. Alpine skier Mikaela Shiffrin looks unstoppable everywhere except the Olympics. She's running out of chances to medal at the Milan Cortina Games.

A bias toward using male lab animals and tissue samples from males may be limiting the effectiveness of medical research, according to top officials at NIH. They'll roll out new guidelines this fall.

Do billionaires have too much influence in both major parties? Three top Republican presidential prospects — Sens. Rand Paul, Marco Rubio and Ted Cruz — say no.

Voters in Brazil go to the polls Sunday to choose a new president. Incumbent Dilma Roussef is up against environmentalist Marina Silva and others, in a nail-biting race.

In India, abortions are legal. But women are often afraid or ashamed to seek an abortion. And for rural women, there may not be a facility nearby. Here is the story of one woman's decision.

In July, the Goats and Soda blog was born. We came into a world obsessed with Ebola. But our readers also loved stories about chocolate, bed rails and jet-setting viruses.