Virgin births discovered in wild snakes
bbc.co.uk
"Researchers in the US caught pregnant females from two snake species and genetically analysed the litters.
That proved the North American pit vipers reproduced without a male, a phenomenon called facultative parthenogenesis that has previously been found only in captive species.
Scientists say the findings could change our understanding of animal reproduction and vertebrate evolution.
It was thought to be extremely rare for a normally sexual species to reproduce asexually."