Humans don’t have a defined mating season like deer or wolves. Here’s how evolution blended biology, culture and social life into year-round intimacy.

Females carry two X chromosomes, and males carry one. Therefore, if Neanderthal males and modern human females were mating ...

This octopus can brood its eggs for nearly four years without eating. Here’s how this biological extreme has reshaped how ...

DAVE WADDLES IS THE LEAD BLACK BEAR BIOLOGIST FOR THE MASSACHUSETTS DIVISION OF FISHERIES AND WILDLIFE. HE MONITORS THE STATE’S BEAR POPULATION, WHICH HAS BEEN GROWING FOR THE LAST 40 YEARS. WE NOW ...

Quick Take Until now, scientists have never understood where tiger sharks travel to mate. An aggregation of tiger sharks in ...

New treatments for male infertility could widen therapeutic options and possibly shift the treatment burden from women.

Baby dinosaurs weren’t coddled like lion cubs or elephant calves—they were more like prehistoric latchkey kids. New research ...

Farm animal advocates have, over the last few decades, successfully drawn public attention to and meaningfully reduced the ...

The natural world has some pretty brutal gaps when it comes to how much time different species get. While a […] ...

The Atacama Desert is one of the driest places in the world. Some areas get very little rain each year. The soil is salty, and in some places it even contains harmful elements like arsenic.

From the traditional types of jutsu from Naruto to the game-changing shinjutsu from Boruto, uncover all the mysteries behind ...

"Primate mothers are some of the best mothers you will find in the animal kingdom," one expert said. So what happened with ...