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Miniaturizing technology is really hard — gears, rotors, belts and pistons that work perfectly at human size just don't work very well at the small scale. So researchers are turning to insects for ideas about how to make tiny flying robots and cameras — and driving a new generation of gadgets.

The fire was moving fast, so firefighters haven't been able to control it. Authorities closed down a 9-mile stretch of the Pacific Coast Highway.

Days after President Obama became the first sitting president to speak before Planned Parenthood's national conference, the administration alienated some women's health groups with a controversial decision about access to emergency contraception.

Wiseacre billionaire Tony Stark, uncharacteristically anxious since the events of 2012's The Avengers, must face down a domestic terrorist without backup from his buddies in the latest installment of the Marvel franchise.

When he signed the bill, Gov. Lincoln Chafee said the state was "living up to the ideals of our founders."

The burden for retirement planning has shifted dramatically, from traditional pensions run by experts to 401(k)s that require decisions by "gravely undereducated investors, Vanguard founder John Bogle says. He says the government should set minimum standards to protect retirement plans.

President Barack Obama is in Mexico for talks with President Enrique Pena Nieto and a speech to young people. His trip aims to highlight the strong ties between the neighbors as well as the need for continuing cooperation on security and immigration matters.

When gut microbes break down certain foods like red meat and eggs, they produce a compound tied to risks for heart attack, stroke and death, a study found. The research could lead to new ways to prevent heart disease by shifting the mix of gut bacteria.

The investigation into the Boston Marathon bombing continues. Investigators have spoken with the parents of the suspects in Russia. Audie Cornish talks to Dina Temple-Raston about the latest developments.

The defense secretary said the U.S. has to be "very careful" before drawing conclusions about Syria. The U.S. has said the use of chemical weapons is a "red line" in the conflict.