Epaulette sharks can reproduce without any measurable increase in energy use, stunning researchers who expected egg-laying to be costly. Scientists tracked metabolism, blood, and hormone levels ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Some species of shark return to the same ...

Scientists are warning that great white sharks may be quietly establishing a breeding population in the Mediterranean, based on a new analysis of 20th and 21st century records that reveals emerging ...