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Too big to hop? Extinct giant kangaroos swaggered

More than 30,000 years ago, giant kangaroos walked the Earth. Three times the size of today’s largest species, these colossal beasts were over 10 feet tall and weighed 240 kg — or 529 lbs. Because of their size, it was hard to tell if they would have moved around like kangaroos do today: by hopping at high speeds and walking on five limbs (arms and tail included) when they slowed down. Now, a study published in PLOS One suggests that these giants may have developed an upright posture — a posture that would have allowed them to put one powerful, gigantic foot in front of the other. In short, they probably didn’t hop at all.

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