Biological Evolution: Unity and Diversity
- Fossils
Where do humans come from?
Some scientists propose a newfound South African species as the most likely ancestor of the line that led to humans. But not everyone accepts that this is where it all began.
- Animals
Infectious animals
Critters spread many germs that can sicken each other — and even kill people.
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- Animals
Churk: Not for Thanksgiving
Here’s what happens when livestock breeders cross a chicken and a turkey
- Animals
The secret songs of giant beavers
Scientists discover a noisemaking chamber in the extinct animal’s skull.
- Fossils
Dino teeth tell a traveling tale
Dental evidence from sauropods suggests the mighty beasts migrated for food.
- Humans
Mummies share their secrets
Cutting-edge technology such as CT, or CAT, scans and endoscopes are allowing scientists to see not just what’s underneath the wrappings but also what’s inside a mummy’s body.
- Humans
Old bones ignite fresh debate
Scientists try to understand how 2 million-year-old fossils fit among ancient species.
- Animals
When the giant ants went marching
A new study of an ancient fossil suggests that 50 million years ago, supersized ants went on a cross-continental trek.
- Fossils
Dangerous dinos in the dark
Eye fossils reveal predatory dinosaurs’ preference for hunting at night.
- Environment
Busy bacteria leave big mark
Earth’s earliest life-forms built mounds on an Antarctic lake bottom.
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