It's time to call Guinness World Records: Researchers on an Antarctic expedition have uncovered sperm cells dating to a whopping 50 million years ago, making these the oldest known animal sperm cells, a new study finds.
It's time to call Guinness World Records: Researchers on an Antarctic expedition have uncovered sperm cells dating to a whopping 50 million years ago, making these the oldest known animal sperm cells, a new study finds.