Mice

A taxidermied Cumulina holds a block of toy cheese.

The Mouse That Squeaked Its Way Into Scientific History

Forget Dolly the Sheep. The birth of a mouse named Cumulina 25 years ago launched a genetic revolution

The parthenogenetic mouse and the offspring

Mice Birthed From Unfertilized Eggs for the First Time

The lab rodent, which only had genes from its mother, grew to adulthood and successfully reproduced, which was thought to be impossible in mammals

Denver Bronco player David Bruton grabs his head on the field after a reported concussion. Many patients with such head injuries suffer symptoms months after their diagnosis, even though their brains look healthy on CT scans.

This Molecule Could Be the Key to Understanding Why Concussions Have Such Long-Term Effects

Neuroscientists identified the molecule that persists in the brain—and showed how to disarm it in mice

A thermal image shows a parrot releasing heat through its beak and talons. Researchers have found that since 1871 some parrots have increased their beak area up to 10 percent.

Animals Are Changing Shape to Cope With Rising Temperatures

Birds, bats, rabbits, mice and other creatures are growing bigger body parts to cool themselves off

This photomicrograph reveals shows a type of Enterococcus bacteria. Strains of Enterococcus are commonly found in the gut.

Fecal Transplants May Reverse Brain Aging in Mice

Older rodents showed improved cognition and behavior after receiving a microbiome refresh from younger rodents

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