sperm competition
Image of the Day: The Long and Short of It
Sukanya Charuchandra | Aug 20, 2018
For flycatchers, the attractiveness of male birds is tied to the length of their sperm.
Scientists Solve Giant Sperm Paradox
Tanya Lewis | May 26, 2016
A study reveals why some male fruit flies produce sex cells that are 20 times the length of their bodies.
The Hidden Side of Sex
Patricia L.R. Brennan | Jul 1, 2014
Sexual selection doesn’t end when females choose a mate. Females and males of many animal species employ an array of tactics to stack the deck in their reproductive favor.