Fern-like bodies once covered the seafloor, some stretching as tall as a person. Yet for millions of years, the animal world barely seemed to budge.

Sexual reproduction only began to improve when early animals began facing more stress and competition ...

Scientists have uncovered the secret of the Amazon molly, an all-female fish species that has survived for 100,000 years ...

The world’s life-forms reproduce sexually in a bewildering variety of ways, even though scientists still aren’t sure why they ...

The way that Earth’s first animals reproduced held back life’s diversity for millions of years, until stress and competition led to the development of sexual reproduction, which in turn accelerated ...

A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million years was due to their reproductive methods. Early animals reproduced by ...

This video explains the stages of mitosis, contrasts them with meiosis and the creation of haploid gametes, and concludes by ...

Frogs that hatch during the cooler months of December through April are exposed to fewer infected frogs, but those they do ...

Every June, Pride Month brings with it a renewed debate about gender, identity, and the science that supposedly settles the ...

This video explains how viruses and bacteria cause certain communicable diseases to occur, how our bodies protect themselves ...

The Amazon molly, an all-female fish, has defied evolutionary expectations by surviving for 100,000 years without males. This remarkable species reproduces through gynogenesis, essentially cloning ...

Full-body defense does not always look the way textbooks say it should. In planarian flatworms, a newly identified cell type ...