Facultative sex allows some animals to reproduce with or without a partner. So why can't humans do it?
If you've ever had a spiny leaf insect as a pet, or you're considering getting one, hopefully someone has warned you about ...
Herbivore or carnivore? A new toolbox for the study of extinct reptiles
Evolution has resulted in the development of both herbivores and carnivores—but how? What type of food did extinct ...