How did massive volcanic eruptions, inland seas, and land bridges pave the way for life?
Deep sleep and REM sleep could be universal among vertebrates, stretching 450 million years back in evolutionary time.
In the late 1970s, a harbor seal named Hoover began catcalling passersby at the New England Aquarium in a thick Maine accent. A new study confirms seals’ uncanny ability to copy human speech.
Wolves lack the facial muscles required to raise their eyebrows—a feature that makes dogs especially endearing to people.
Some African mole-rats seem to tolerate the burn of spicy plants or biting insects that cause most other animals excruciating pain.
These crafty birds might be capable of interpreting and internalizing the emotions of others.
The rise of bed bugs preceded modern humans by at least 100 million years. They survived the extinction that killed the dinosaurs. Could they outlive us all?
A sweeping genomic study expands the equine family tree and pinpoints how humans might have reshaped the equine gene pool.