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 ...

The study revealed unexpected and sex-specific effects of germline regulation on longevity and somatic repair in vertebrates. Contrary to classical evolutionary theories, it turns out that changing ...

In Telford's Exotic Zoo, life found a way. A casque-headed iguana has given birth to eight babies at the Shropshire wildlife park – without any contact with a male, via a phenomenon called ...

2.2.2. Biotic factors in ESD -- 2.2.3. Mechanisms underlying ESD -- 2.2.3.1. Stress-mediated regulation of ESD -- 2.2.3.2. Epigenetic regulation of ESD -- 2.3. Polygenic sex determination -- 3. Sexual ...

What really did come first--the chicken or the egg? Birds' reproductive biology is dramatically different from that of any other living vertebrates, and ornithologists and paleontologists have long ...

Asexual reproduction is common for animals like starfish, deep-sea worms, and stick insects, but among vertebrates, it’s a rarity. A process called parthenogenesis allows some female animals to ...

Scientists have found the first instance of melatonin directly acting on a neuropeptide in the vertebrate brain, they reported February 7 online in PNAS. "This suggests if melatonin can do this on one ...

LONDON (Reuters) - Sex has been a fact of life for at least 380 million years, longer than previously thought. Internal fertilization was widespread among prehistoric fish living on ancient tropical ...