Image of the Day: Fight Club
Image of the Day: Fight Club
South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.
Image of the Day: Fight Club
Image of the Day: Fight Club

South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.

South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.

adaptation
Image of the Day: Hot Stripes
Image of the Day: Hot Stripes
Chia-Yi Hou | Jun 14, 2019
Biologists study how a zebra’s hair helps it keep cool.
Image of the Day: Water Flea
Image of the Day: Water Flea
Sukanya Charuchandra | May 29, 2018
A species of water flea in northern Belgium that helps keep algae in check is growing smaller and less abundant in urbanized areas. 
Free Divers From Southeast Asia Evolved Bigger Spleens
Free Divers From Southeast Asia Evolved Bigger Spleens
Anna Azvolinsky | Apr 19, 2018
The adaptation gives better endurance to the Bajau people, known as sea nomads, by increasing spleen size and, in turn, boosting the number of oxygenated red blood cells when diving.  
Hawaiian Spiders on Different Islands Evolved Same Disguise in Parallel
Hawaiian Spiders on Different Islands Evolved Same Disguise in Parallel
Catherine Offord | Mar 8, 2018
In an unusual evolutionary twist, local stick spiders have come up with an almost identical repertoire of color morphs in multiple locations.
Global Patterns of Human Epigenetic Variation
Global Patterns of Human Epigenetic Variation
Ashley Yeager | Aug 28, 2017
A study of five far-flung human populations gives clues to adaptations to environmental pressures.
Pollution Drives Marine Reptile Color Change
Pollution Drives Marine Reptile Color Change
Bob Grant | Aug 11, 2017
The turtle-headed sea snake is losing its stripes, and researchers suggest that the change reflects adaptation to fouled oceans.
Image of the Day: Tiny but Telling Flea
Image of the Day: Tiny but Telling Flea
The Scientist Staff | May 8, 2017
The recently updated genome sequence of the Daphnia pulex can shed more light on how it adapts to stress, environmental toxins, and warming temperatures.
Infographic: Watching Evolution in Real Time
Infographic: Watching Evolution in Real Time
Jef Akst | Apr 30, 2017
Guppies transplanted between different communities in Trinidadian streams evolved in response to changes in predation threat in just a few generations.
Abscisic Acid’s Role in Ferns Finally Determined
Abscisic Acid’s Role in Ferns Finally Determined
Jef Akst | Feb 1, 2017
Researchers solve the mystery of 15-year-old mutant ferns with disrupted sex determination.