Was Stonehenge constructed by builders fueled on 'energy bars'?
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Historians have found tasty new evidence that the people who built Stonehenge supplemented their meat and dairy diets with nut and fruit «energy bars» made with animal fat.
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?
