Biological Evolution: Unity and Diversity
- Animals
Surprise! Fossils in a flash
By studying how dead tissues decay — or turn to ‘instant’ fossils — scientists are gleaning helpful clues to what ancient life looked like.
- Animals
When a species can’t stand the heat
When temperatures rise, New Zealand’s tuatara produce more males. With global warming, that could leave the ancient reptile species with too few females to avoid going extinct.
- Animals
Explainer: How invasive species ratted out the tuatara
The introduction of rats to New Zealand led to huge population losses of the ancient tuatara. These uncommon reptiles vanished from the mainland. This left isolated populations to survive on several dozen isolated islands.
- Fossils
Scary ‘chicken’ roamed Earth with T. rex
Scientists have just pieced together evidence of a weird new dinosaur that sported sharp claws, feathers and a beak. And it just may have been one of the last dinos to roam Earth about 67 million years ago.
- Fossils
Reviving dinosaurs
With the help of computers, researchers are getting a pretty good idea of how these ancient creatures moved, walked and ate.
- Archaeology
Ancient footprints surface in Britain
There are hints they could have been made by ancestors of Neandertals.
- Life
Caught in the act
Scientists observe some evolutionary speed demons as they adapt over the course of just a few years to new environmental conditions.
- 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.
