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

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

If you've ever had a spiny leaf insect as a pet, or you're considering getting one, hopefully someone has warned you about this: if you put one in your enclosure, you might come back some time later ...

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?

Katherine Gallagher is a writer and sustainability expert. She holds a B.A. in English Literature from Chapman University and a Sustainable Tourism certificate from the GSTC. Parthenogenesis, a form ...

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 ...

The way that Earth’s first animals reproduced held back life’s diversity for millions of years, until stress and competition ...

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 ...

GREENVILLE, S.C. — For weeks, zookeepers suspected that Autumn, the 8-year-old Masai giraffe, was pregnant again. The world had watched in awe on live video as Kiko, Autumn's first calf, dropped from ...

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

Animals possess circadian clocks, or 24 h oscillators, to regulate daily behavior. These typically take their cues from the periodic change of sunlight and darkness. However, many animals are also ...

If you’ve ever had a spiny leaf insect as a pet, or you’re considering getting one, hopefully someone has warned you about this: if you put one in your enclosure, you might come back some time later ...