Astronomers found four monster stars, one more than 300 times the mass of our sun. They were created from the merger of lighter stars in tight binary systems.
Scientists have found that Earth's land areas are much more likely to experience an extreme summer heat wave than they were in the middle of the 20th century.
Research adds to the growing body of evidence that there’s a link between allergies and reduced risk of a serious type of cancer that starts in the brain.
Clues to Mars’ hidden past and what may have happened to its long-ago vanished rivers, and perhaps even oceans may be revealed when NASA’s Curiosity lands on Mars.
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