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The space firm will send a supply capsule into orbit, and then try a new way to recover the part of the rocket that carried it. If it works, the cost of going to space could be reduced dramatically.

A lot has changed in the month since the first Republican presidential debate — perhaps most notably the number of Republican rivals willing to attack Donald Trump.

The main debate will feature 10 candidates with Donald Trump and Ben Carson at center stage next Wednesday. Meanwhile, four candidates will face off in the undercard debate.

The department says it is looking into "possible unlawful coordination" by several major carriers. American and United have confirmed that they are among the airlines under scrutiny.

Computer-related problems on the New York Stock Exchange halted trading for more than three hours on Wednesday, but it was not a one-off.

Laparascopic surgery can be faster, safer and cheaper, but patients don't always get the choice even if it's appropriate, a study finds. Using it more often would reduce complications and save money.

You may love or hate "the wave" as it sweeps through spectators at baseball, football and soccer games. But physicists say the synchronized action shows how humans are like particles.

The Trump administration wants to cut both food aid to the poor and subsidies for the nation's farmers. Supporters of both programs are joining forces to fight the cuts in Congress.

The education secretary testified before a House subcommittee on the Trump administration's 2018 budget proposal, which calls for deep cuts to education.

On an app that allows users to remain anonymous, the person warned black students to stay off campus. The University of Missouri said the suspect was apprehended off campus.