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.

According to research, scientists know quite a lot about sharks. For example, we know that an estimated 57 shark species are bioluminescent (can produce light). We know that certain sharks, like whale ...

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

As commercial spaceflight edges closer to reality, astronauts spend more time orbiting Earth, and as we look to one day settle on Mars, questions about sex and reproductive health in space need to be ...

A study said that Neanderthal men and human women were particularly inclined to mate, a sexual habit that offers insight into the evolution of the modern human genome.

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

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 ...

A complex picture of how Neanderthals died out, and the role that modern humans played in their disappearance, is emerging. When you purchase through links on our site, we may earn an affiliate ...

The allure of an aquatic lifestyle, reminiscent of our finned friends, is undeniably enchanting. However, the reality of our biology complicates this vision; our lungs crave the oxygen-rich air that ...

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 ...