Image of the Day: Self-Insemination
Image of the Day: Self-Insemination
Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.
Image of the Day: Self-Insemination
Image of the Day: Self-Insemination

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

insemination
Self-fertilizing Worms Stab Their Own Heads
Self-fertilizing Worms Stab Their Own Heads
Amanda B. Keener | Jul 1, 2015
The flatworm, Macrostomum hystrix, can inject its own sperm into its head, a new study shows.
Book Excerpt from <em>Nature’s Nether Regions</em>
Book Excerpt from Nature’s Nether Regions
Menno Schilthuizen | Jul 1, 2014
In Chapter 6, “Bateman Returns,” author Menno Schilthuizen surveys the battlefield of the evolutionary arms race that has led to, among other things, such excesses as “traumatic sex.”