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 ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Being pregnant and giving birth is hard work for any species—but ...

Here’s what you’ll learn when reading this story: Chondrichthyan fishes—a group that includes rays, skates, chimaeras, and sharks—are thought to have energy intensive reproduction cycles due in no ...

When Laurie was a kid, she had recurrent nightmares that featured her getting eaten by a shark. Decades later, Laurie goes to sleep next to them (or at least in the same house). She’s the proud owner ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Epaulette shark (Hemiscyllium ocellatum), a shark made famous thanks to their ability to ...