We know that boys and girls are produced in much the same frequency. But how—and why—is this 1:1 ratio achieved? A new paper searches huge human data sets for gene variants that throw the 1:1 sex ...

MILAN (AP) — Venice has been charmed by a recent visitor: An acrobatic, wild dolphin. The feeling appears to be mutual — he ...

Source: Shark Bay Research Program, used with permission. Species across the animal kingdom play, suggesting the behavior has benefits. Scientists have long hypothesized a link between juvenile social ...

Biological sex is usually described in simple binary terms: male or female. This works well for germ cells (sperm versus eggs), but for other body organs it is of little help. A new study by the Max ...

The animal world is taking a page from the human one. Scientists studied the mating habits of humpback male dolphins for 10 years, and they found out that they give their female counterparts gifts of ...

Romance isn’t dead yet — at least not in waters off the western coast of Australia. Scientists have recently observed humpback male dolphins in the region presenting females with large marine sponges ...