Beluga whales avoid inbreeding by switching partners over time, helping a small, isolated population stay genetically healthy ...

Size really does matter, but only up to a point. Men may overestimate the extent to which a large penis makes them attractive to women, researchers have found.

Decades ago, doctors created a test to determine which breast cancer patients should receive hormone therapy. Now, researchers are using the same tactics to advance prostate cancer treatment.

In an essay, health journalist Meghan Rabbitt shares overlooked health facts that she uncovered while reporting her new book, ...

In the icy waters of Alaska’s Bristol Bay, a new study reveals how a small population of beluga whales (Delphinapterus leucas) survive the long haul through a surprising strategy: they mate with ...

For years we’ve heard the old adage that “size matters.” And according to a new study, it turns out that it really does, but ...

“While the human penis functions primarily to transfer sperm, our result suggests its unusual large size evolved as a sexual ornament to attract females rather than purely as a badge of status to ...

Size matters” sounds like a tabloid cliché, but for evolutionary biologists the size of the human penis is truly a puzzle. Compared to other great apes, such as chimpanzees and go ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, ...