Animal reproduction encompasses the full sequence from gamete formation through fertilisation, embryonic development and parturition. In farm and companion species alike, natural breeding is ...

The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...

Researchers in Canada discovered 567-million-year-old Ediacaran fossils that may contain the earliest evidence of sexual ...

The Canadian fossils belong to the White Sea group. But they appear to be around 567 million years old – 5 to 10 million ...

Scientists in Canada have uncovered 567-million-year-old fossils that may rewrite the story of early animal evolution.

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 ...