A duplicated gene evolved into a switch that determines sex in frogs, revealing how evolution can safely reshape critical ...

What came first — the plant or the seed? Columnist Carol Barany explores how plants made the leap from water to land, why ...

Beluga whales can disappear beneath Arctic sea ice for long stretches, which makes them far tougher to follow than many other whale species. That is why researchers have increasingly turned to ...

Women of African descent are four times more likely to have uterine fibroids. Although many of these cases are asymptomatic ...

Here’s all you need to know about an often-overlooked reality that is leading to a silent yet severe reproductive health crisis in India ...

Wild turkeys can feel like a steady presence, a familiar silhouette at field edges and oak ridges. Yet wildlife biologists ...

The Surinam toad has an unusual trick for reproduction: instead of leaving their spawn in water to develop, once the eggs are laid, the male presses them into the female's back.

Groundhogs emerge from their burrows around Feb.4. This fits the folklore of Groundhog Day, but predicting the weather is not ...

These “walking sharks” can lay eggs without spending extra energy, rewriting what scientists thought they knew about reproduction.

Once a seed germinates, it is committed to one location. Plants are sessile—stuck where they started out—forced to cope with ...

Early in development, many animals pick a team—male or female—based on their genetics, and, with time, acquire the ...

Women in India were told they couldn't be paid for their eggs. The result: a black market for eggs from women in need of ...