Ancient giant sperm discovered at Riversleigh World Heritage Fossil Site

Preserved giant sperm from tiny shrimps that lived about 17 million years ago have been discovered in Queensland, Australia. They are the oldest fossilized sperm ever found in the geological record. The shrimps lived in a pool in an ancient cave inhabited by thousands of bats, and the presence of bat droppings in the water could help explain the almost perfect preservation of the fossil crustaceans.

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