540m-year-old bug tracks are oldest footprints ever discovered
by Hannah Devlin Science correspondent from Science | The Guardian on (#3RS2Q)
Ancient prints bring scientists closer to understanding what were the first creatures to evolve pairs of legs
The oldest known footprints on Earth, left by an ancient creepy-crawly more than 500 million years ago, have been discovered in China.
The tracks were left by a primitive ancestor of modern-day insects or worms, according to scientists. Precisely what the creature looked like is a mystery, though: nothing this old with legs has been discovered to date.
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