The male echidna has five X chromosomes, but only four Y chromosomes, whereas the male platypus has five X and five Y). During production of sperm and eggs (meiosis), these sex chromosomes pair in ...

A second video has emerged appearing to show US influencer who was caught on camera snatching a baby wombat away from its ...

A second video clip has emerged of US influencer Samantha Strable — who goes by the name Sam Jones online — this time picking ...

A nearly gapless genome sequence of the echidna, an egg-laying mammal with multiple sex chromosomes, helps researchers to track genomic reorganization events that gave rise to a highly unusual sex ...

What is the echidna? Echidnas are part of a group of animals called monotremes, which is the only group of mammals that lay eggs instead of giving birth to live young. Echidnas are one of only ...