Image of the Day: Plumage Patterns
Image of the Day: Plumage Patterns
An island songbird evolved into five populations of different color variants despite inhabiting territories just 10 kilometers apart.
Image of the Day: Plumage Patterns
Image of the Day: Plumage Patterns

An island songbird evolved into five populations of different color variants despite inhabiting territories just 10 kilometers apart.

An island songbird evolved into five populations of different color variants despite inhabiting territories just 10 kilometers apart.

sexual selection
Why Chimpanzees Have Big Testes, and Mandrills Have Small Ones
Why Chimpanzees Have Big Testes, and Mandrills Have Small Ones
Katarina Zimmer | Apr 16, 2019
For primates, males’ fancier ornaments are linked with smaller testes, according to a new comparative study.
Larger Hermit Crab Penises May Prevent Shell Theft
Larger Hermit Crab Penises May Prevent Shell Theft
Abby Olena | Jan 16, 2019
Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.
Image of the Day: Beetle Fight
Image of the Day: Beetle Fight
Jef Akst | Dec 3, 2018
The exaggerated horns and elongated forelegs of male flower beetles, which use these appendages as weapons in combat for females, do not slow down the insects in a race.
Image of the Day: Size Matters
Image of the Day: Size Matters
The Scientist Staff, The Scientist Staff | Feb 23, 2018
The male proboscis monkey’s large nose probably evolved in response to female preference and competition between males.
Image of the Day: Glowing Chameleon
Image of the Day: Glowing Chameleon
The Scientist Staff, The Scientist Staff | Jan 23, 2018
The lizards may be signaling one another using fluorescent cues that we can’t see.
The Genetic Strategies of Dealing with High Altitude
The Genetic Strategies of Dealing with High Altitude
Abby Olena | Nov 2, 2017
Andean highlander genomes possess cardiovascular-related variants, while populations from other regions evolved different solutions to manage the lack of oxygen.
Female Fish Select Mates’ Sperm
Female Fish Select Mates’ Sperm
Ben Andrew Henry | Aug 17, 2016
A protective coating on ocellated wrasse eggs helps female fish select sperm from nest-building males.
Scientists Solve Giant Sperm Paradox
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.
Lizard Swaps Mode of Deciding Its Sex
Lizard Swaps Mode of Deciding Its Sex
Kerry Grens | Jul 1, 2015
Sex assignment in bearded dragons can flip from one based on chromosomes to one driven by temperature, researchers report.
From the Feature Well
From the Feature Well
Jef Akst | Dec 29, 2014
A review of The Scientist’s 2014 special issues, highlighting trending areas of research across the life sciences
Connecting the Dots
Connecting the Dots
Anna Azvolinsky | Aug 1, 2014
Extending her initial studies of social wasps, Mary Jane West-Eberhard has spent her career probing the evolutionary relationship between social behavior and developmental flexibility.
Carnal Knowledge
Carnal Knowledge
Bob Grant | Jul 1, 2014
Sex is an inherently fascinating aspect of life. As researchers learn more and more about it, surprises regularly emerge.
Contributors
Contributors
Rina Shaikh-Lesko | Jul 1, 2014
Meet some of the people featured in the July 2014 issue of The Scientist
The Hidden Side of Sex
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.
Doodoo Rendezvous
Doodoo Rendezvous
Bob Grant | Jun 30, 2014
Watch flightless dung beetles (Circellium bacchus), sneaky copulators and crap connoisseurs, do their thing in South Africa.
Faces for Fighting?
Faces for Fighting?
Jef Akst | Jun 10, 2014
Scientists propose that hominin facial bones evolved for protection against the powerful blows of combat.
For Some Male Crickets, Silence Means Survival
For Some Male Crickets, Silence Means Survival
Sandhya Sekar | May 29, 2014
Two island populations of male crickets independently evolved to evade parasites by keeping quiet, and have come up with a way to sneak matings with females that still seek the male courtship song.
Standing Up for Sex
Standing Up for Sex
Henry Gee | Dec 1, 2013
Humans evolved the ability to walk on two legs because it allowed them to more accurately size up prospective mates. Or did they?
Book Excerpt from <em>The Accidental Species</em>
Book Excerpt from The Accidental Species
Henry Gee | Nov 30, 2013
In Chapter 7, “The Way We Walk,” author Henry Gee describes the first steps taken by the ancestors of Homo sapiens.