Unknown human ancestor may have walked a bit like a bear on its hind legs
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Ancient footprints reveal a mysterious relative of humans may have lived at the same time and in the same area as the famous human ancestor «Lucy» in Tanzania.
Watch a black hole rip 4 stars to shreds in epic new NASA simulation
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NASA astronomers flung 8 stars into a black hole's path in a new simulation that tests the limits of stellar survival in the face of space's most destructive objects
This doomed alien planet has a year that lasts just 16 hours — and it's getting faster
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Astronomers spotted a new gas giant with the shortest known orbit. The world takes just 16 hours to circle its star — but someday, the dance may come to an abrupt end.
How calories are calculated: The science behind your food
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A main technique people use when trying to lose weight is to calculate calories in their meals. But what exactly are calories, and how do food scientists determine whether a granola bar has 100 or 300 calories?
