Trilobites: The Evolutionary Origin of Descending Testicles Descending testicles were likely present in the earliest mammals, then subsequently disappeared in elephants, manatees and their relatives, according to a new study. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:SpaceX Is Now One of the World’s Most Valuable Privately Held CompaniesDr. Herbert Needleman, Who Saw Lead’s Wider Harm to Children, Dies at 89What time is the Delta Aquarid meteor shower 2017 TONIGHT?Trilobites: Fate of Ancient Canaanites Seen in DNA Analysis: They SurvivedGiant Telescope Atop Hawaii’s Mauna Kea Should Be Approved, Judge SaysVideo of Shark, Seemingly Bound and Dragged by a Boat, Under Investigation
