Researchers have manipulated chromosomes inside a stem cell to produce mice with two biologically male parents. Stem cell biologist Katsuhiko Hayashi of Japan's Osaka University and his team say they ...

In July 1962, 23-year-old French geologist and speleologist Michel Siffre undertook a radical self-experiment: to live in complete isolation inside a glacier cave in the Scarasson mountain in the ...

A hormone-free pill, called YCT-529, that temporarily stops sperm production by blocking a vitamin A metabolite has just concluded its first safety trial in humans, getting a step closer to increasing ...

British scientists have created eight children in a lab over the past two years whose health continues to be monitored in hopes of determining if research methods that incorporate a third parent in ...