Fifty years ago, the White House was the site of an unusual party.
It was a celebration of the Emancipation Proclamation's centennial, held on Abraham Lincoln's birthday, and many of the guests were descendants of the people Lincoln's historic document freed.
But noticeably absent was the Rev. Martin Luther King Jr. The civil rights leader had declined the invitation after earlier conversations with President Kennedy about segregation had yielded few results.
A common vitamin supplement appears to dramatically reduce a woman's risk of having a child with autism.
A study of more than 85,000 women in Norway found that those who started taking folic acid before getting pregnant were about 40 percent less likely to have a child who developed the disorder, researchers reported in the Journal of the American Medical Association.
North Korea's latest nuclear weapons test is much more powerful than the previous two, according to estimates made by instruments that measure seismic waves from the blast. It's about the size of the bomb that devastated Hiroshima in World War II.
But it's not so easy to verify the claim that the nuclear explosive has also been miniaturized. That's a critical claim because a small warhead would be essential if the rogue regime chose to threaten the United States with a nuclear-tipped missile.
Big bombs are easier to make, but they aren't all that useful as a threat.
The long, clunky-looking fishing boat pulls up to Day Boat Seafood's dock near Fort Pierce, Fla., after 10 days out in the Atlantic. The crew lowers a thick rope into the hold, and begins hoisting 300-pound swordfish off their bed of ice and onto a slippery metal scale.