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30-Sep-2019 03:34

The new fossils are up to 10 million years older than previously known footprints.“Many animals, from bumble bees to bristle worms, have legs or leglike appendages,” Xiao said.

Again, please keep their identity a secret Click on the "Continue" button search with your zip/postal code.“Some have a few appendages, others, such as centipedes and millipedes, have hundreds, but all have an even number of appendages placed symmetrically on both sides of the body.Appendages come in different forms, some are jointed legs as in bumble bees, and others are simple outgrowths of the body.” The when of the tracks is known, but not the who. “We have not yet found the animals that made the footprints.The findings of these ancient footprints are published in the latest issue of Science Advances and may help scientists determine when and how legs and limbs evolved.

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A closeup photograph of the world’s oldest known footprints, made by a small unknown bug, were found in South China by Virginia Tech’s Shuhai Xiao and a research team.

“Back then, oxygen was scarce in the atmosphere and ocean, and animals needed to find oxygen to make a living,” Xiao said.

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