Our planet is filled with a dazzling variety of creatures that bump uglies to reproduce. Cats do it. Dogs do it. The birds and the bees definitely do it. But what were the first animals to have sex?

Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities ...

How do animals decide when to fight and when to walk, fly, slither, or swim away? Most research on animal conflict has focused on the short-term costs of single interactions, but a pair of behavioral ...

In the framework of an international research project, a team of scientists have demonstrated for the first time that asexual reproduction can be successful in the long term. The animal they studied ...

A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million ...

These unusual facts about animal sexuality expose the oddities associated with animal reproduction and sexual habits in nature. Whether it’s an eccentric animal reproductive method or a strange ...

Plastic waste in the water might be stopping -- or interrupting -- some shrimp-like creatures from reproducing. In a unique study, the ability of 'shrimp like' creatures to reproduce successfully was ...

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The common fruit fly normally needs a mate to reproduce. But scientists tinkering with its genes found the ones that can induce parthenogenesis, or virgin birth. For the first time, scientists ...

It may sound too bizarre to be true, but the Amazon molly (Poecilia formosa), a fish that inhabits rivers, lakes, and swamps in Mexico and Texas, exists over much of its range in populations that are ...