New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

This story is part of a week-long series on reproduction, from prenatal testing to childfree Reddit. Reproduction is messy. The genetic swaps and recombinations that occur when gametes merge don't ...

This story is part of a week-long series on reproduction, from prenatal testing to childfree Reddit. Bacteria do it. Viruses do it. Worms, mammals, even bees do it. Every living thing on earth ...