The common smooth-hound shark is listed as endangered. Solving the mysteries of its reproductive behaviors helps scientists learn how to keep the species alive. Getty Images/iStockphoto Female sharks ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. An endangered species of shark has been observed having "virgin births" for the first time. Two of these common ...

Parthenogenesis, a form of asexual reproduction in which an egg develops in the absence of fertilisation, has traditionally been associated with invertebrates. However, recent discoveries have ...