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A drop in the numbers of fierce beasts worldwide might seem like good news for deer and antelope. But expanding herds of grass-eaters leave stream banks naked and vulnerable to erosion, and can even change the stream's course, according to scientists calling for more protection of large predators.

Centuries into the future, cranky technophobe Huw gets dragged into a massive conspiracy after someone at a party infects him with a technological parasite. Rapture of the Nerds is the latest from science-fiction stars Charles Stross and Cory Doctorow, but it may be tough going for non-nerds.

A collection of science fiction books, letters and manuscripts, valued at more than $2 million, is now in the hands of the San Diego State University library.

A mouse brain boasts more than 200 different kinds of cells, say scientists, who are busy cataloging everything known about each type. Next up: a data trove of details on human brain cells.

Pretty much everyone thinks that rewards bring happiness, but it's not the size of the payoff that matters, researchers say. Rather it's whether the reward exceeds your immediate expectations.

Some people who don't have celiac disease say they feel better on a gluten-free diet. Researchers have long been puzzled as to why. A study suggests it could be because of a protein called zonulin.

State Sen. Marty Block and fellow Democrat, Assembly Speaker Toni Atkins, found little to disagree on at a debate on Wednesday. Atkins is challenging Block for his seat.

Deciphering events in North Korea often resembles long-distance psychoanalysis more than reporting. The country's latest nuclear test is no exception.

Saudi women gamers gather at an annual convention, dressing as their favorite characters and exercising freedoms they want to see more of in their lives.

The Falcon 9 rocket was carrying supplies to the International Space Station when it exploded June 28. Musk, the SpaceX CEO, said that going forward, the company would individually test each strut.