For millions of years, some of Earth’s earliest animals barely changed. They lived, grew, and spread across the seafloor, but ...

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

Birds do it, and bees do it. Indeed, researchers estimate that over 99.9% of eukaryotes reproduce sexually. What, then, are the true costs and benefits of sex? Yet again, this simple example ...

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 ...

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 ...

It seems paradoxical: embryos formed in microgravity initially show increased vigor, but then encounter growth problems. This discovery raises questions about the possibility of reproduction during ...

In a recent and historic breakthrough, scientists managed to reproduce rats without the need for male sperm, an important milestone that opens the question about the future of genetics and the ...