The scientists have discovered world's oldest sperm in 17 million-year-old fossilized remnants of ancient crustaceans. This sperm is different from other types of sperms as it does not have a tail and consists only of a large head. The sperm and other internal reproductive organs belong to fossilized ostracods or seed shrimp. These organisms are tiny crustaceans that have existed for 500 … [Read more...]