The Amazon molly is an all-female fish that ditched sexual reproduction entirely, thriving for over 100,000 years through ...

Scientists discovered that making a very small change to female mice's DNA caused them to develop male reproductive organs.

The hectocotylus is both a reproductive and sensory organ, Harvard scientists and others have found. Octopuses are some of the most mysterious animals living in the sea. In research out today, however ...

The okapi is a star attraction at Antwerp Zoo, and has been since 1919, when the zoo made world history by displaying the giraffe-like animal to the public for the first time. The new calf is the ...

Loneliness affects people of all ages and backgrounds. Cases have been rising globally since the 1970s, prompting both U.S. and global health authorities to recognize it as a widespread public health ...