At the center of the cluster is one huge galaxy that's giving birth to new stars at an astonishing rate. The discovery is described in the journal Nature. And it should force a rethink of how galaxies and galaxy clusters evolve.
In Africa, a nutrition success story: Swapping orange sweet potatoes for white ones is improving the health of children by boosting vitamin A levels. Researchers are now trying to duplicate their success with other crops.
Thirty-five years ago today an astronomer wrote "Wow!" when he saw evidence of what might have been a message from deep space. One like it hasn't been detected since. Today, National Geographic's Chasing UFOs sends a reply.
A little chocolate may lower your blood pressure, scientists say, but don't throw out the medicines just yet. The new study is the latest in a string of signs that some of the properties in chocolate might be good for you.
South America's Chinchorro people lived in an extremely dry desert region where the dead turned into mummies naturally. But at some point, they stopped leaving the process to nature. Now, scientists say the Chinchorros began mummifying their dead as their climate grew wetter.
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