
Dinosaurs' Air Sacs Evolved Many Times and Let Them Take Over the World
An extensive system of air sacs, evolved over and over, let dinosaurs grow larger without sacrificing strength
An extensive system of air sacs, evolved over and over, let dinosaurs grow larger without sacrificing strength
This ancient creature swam in surprisingly modern seas
Fossil trackways may show tyrannosaur tykes teaming up
Walking on all fours helped shape the panda's “thumb”
A small, speedy, omnivorous dinosaur was a forerunner of Brachiosaurus and other giant plant-eaters
New fossil analysis offers the first physical evidence of this launch strategy
Fossil animals’ inner ear structures offer clues on when endothermy, or warm-bloodedness, evolved
Some species were constrained by their food sources, while others ranged widely
An amazingly well-preserved fossil suggests the common ancestor of dinosaurs and pterosaurs also had some type of feather or feather precursor
A related lineage’s explosive growth leaves just one descendant today
New evidence suggests an origin to an exceptionally hot period in Earth’s history
Fangs evolved over and over because of this groovy process
Seeds found in fossilized tracks fuel new speculation about when—and how—people arrived
Piecing together a paleontological puzzle
When the sun disappeared, tiny coccoliths turned to hunting
Ancient DNA preserved in soil may rewrite what we thought about the Ice Age
Life’s great radiations do not always line up with mass extinctions, a new study shows
The extinct giant canids were a remarkable example of convergent evolution
Fossils of small, delicate animals may reveal the early history of gigantic flying reptiles
Debate erupts over how best to estimate the sizes of the largest creatures ever to have walked the earth
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