Larger Hermit Crab Penises May Prevent Shell TheftLarger Hermit Crab Penises May Prevent Shell Theft
Larger Hermit Crab Penises May Prevent Shell Theft
Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.
Larger Hermit Crab Penises May Prevent Shell Theft
Larger Hermit Crab Penises May Prevent Shell Theft

Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.

Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.

Sparrow, developmental biology, evolution
Image of the Day: Evolution Underground
Image of the Day: Evolution Underground
Carolyn Wilke | Jan 15, 2019
The lay of the land shapes the diversity of groundwater-dependent salamanders.
Image of the Day: Fight Club
Image of the Day: Fight Club
Carolyn Wilke | Jan 11, 2019
South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.
Leader of Evo-Devo Field, Rudy Raff, Dies
Leader of Evo-Devo Field, Rudy Raff, Dies
Jef Akst | Jan 9, 2019
The Indiana University professor was known for his research on the evolution of organismal development.
Image of the Day: Wisdom Teeth Lost
Image of the Day: Wisdom Teeth Lost
Carolyn Wilke | Jan 9, 2019
A study of tiny monkey skulls and teeth suggests that shrinking body size didn’t crowd out wisdom teeth during evolution.
Image of the Day: It’s a Shark!
Image of the Day: It’s a Shark!
Carolyn Wilke | Jan 8, 2019
A newly developed underwater ultrasound reveals a fetal shark swimming between the two uteri of its mother.
Image of the Day: Embryo in Blue
Image of the Day: Embryo in Blue
Carolyn Wilke | Jan 7, 2019
A bright blue stain highlights the sensory nerves of a developing mouse embryo.
Infographic: Human Endogenous Retroviruses and Disease
Infographic: Human Endogenous Retroviruses and Disease
Katarina Zimmer | Jan 1, 2019
Human endogenous retroviruses that colonized vertebrate DNA millions of years ago have long been dismissed as junk DNA, but researchers now know that they may play important roles in cancer, neurodegeneration, and other ailments.
Infographic: How Cities Influence Evolution
Infographic: How Cities Influence Evolution
Catherine Offord | Jan 1, 2019
Urban environments are driving genetic changes in resident species through multiple mechanisms, from establishing gene flow barriers to exerting novel selection pressures.
Infographic: How Exposure to Cannabis in Utero Affects Development
Infographic: How Exposure to Cannabis in Utero Affects Development
Andrew Scheyer | Jan 1, 2019
Rodent and human studies have revealed a multitude of effects starting during gestation and lasting into adulthood.