Image of the Day: Spider Sex
Image of the Day: Spider Sex
Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.
Image of the Day: Spider Sex
Image of the Day: Spider Sex

Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.

Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.

copulation
Image of the Day: Monkey Business
Image of the Day: Monkey Business
The Scientist Staff | Jan 10, 2017
For the first time, researchers have documented interspecies sexual behavior between a male Japanese macaque and a female sika deer.
Guppie Porn
Guppie Porn
The Scientist Staff | Jul 31, 2016
Biologist Carin Bondar delivers a TED talk about the wilder side of sex.
Ancient Sex
Ancient Sex
Sandhya Sekar | Oct 19, 2014
Fossils of an extinct, armored fish challenge current understanding of when copulation and internal fertilization evolved in jawed vertebrates.
Speaking of Sex
Speaking of Sex
The Scientist Staff | Jul 1, 2014
July 2014's selection of notable quotes
A Rock and a Hard Place
A Rock and a Hard Place
Bob Grant | Jul 1, 2014
Meet the retired chemical engineer who has made quite the impression on paleoentomology by uncovering ancient secrets of insect coitus.
Size Matters
Size Matters
Tracy Vence | Jul 1, 2014
The disproportionately endowed carabid beetle reveals that the size of female—and not just male—genitalia influences insemination success.
Geni-Tales
Geni-Tales
Menno Schilthuizen | Jul 1, 2014
Penises and vaginas are not just simple sperm delivery and reception organs. They have been perfected by eons of sexual conflict.
 
Imaging Intercourse, 1493
Imaging Intercourse, 1493
Rina Shaikh-Lesko | Jul 1, 2014
For centuries, scientists have been trying to understand the mechanics of human intercourse. MRI technology made it possible for them to get an inside view.
Spineless Sex
Spineless Sex
The Scientist Staff | Jul 1, 2014
Not to be outdone by vertebrates, invertebrates employ a suite of interesting structures and behaviors to accomplish procreation.
Sex in a Scanner
Sex in a Scanner
Rina Shaikh-Lesko | Jun 30, 2014
Meet Pek Van Andel, who conducted the famous MRI sex experiment, and see his research in action.
Slippery Passion
Slippery Passion
Bob Grant | Jun 30, 2014
Observe the sinuous sensuality of mating brook lampreys (Lampetra planeri).
Gifts During Sex Matter After
Gifts During Sex Matter After
Yao-Hua Law | Oct 28, 2013
Female spiders prefer sperm from males with gifts, a study shows.
Widening the Fertile Window
Widening the Fertile Window
Robert Martin | Jul 1, 2013
Women may be able to store viable sperm for longer than a week, thus contributing to apparent variability in pregnancy lengths.
Book Excerpt from <em>How We Do It: The Evolution and Future of Human Reproduction</em>
Book Excerpt from How We Do It: The Evolution and Future of Human Reproduction
Robert Martin | Jun 30, 2013
In Chapter 3, “From Mating to Conception,” author Robert Martin explores the question of why humans and other primates frequently engage in sexual intercourse when females are not fertile.