A new study published in Nature has found that more than 56 percent of the world's oceans have changed color in the past 20 years, and climate change is to blame.
A storm churning in waters off the eastern U.S. has increased to tropical storm strength and is forecast to reach the North Carolina coast Friday morning, the National Hurricane Center said.
A NASA spacecraft will fly by Earth on Sunday and drop off what is expected to be at least a cupful of rubble it grabbed from the asteroid Bennu, closing out a seven-year quest.