Biological Evolution: Unity and Diversity
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AnimalsThe secret to T. rex‘s incredible biting force is at last revealed
The force of a T. rex bite was roughly 6 metric tons. A new study points to what’s behind that mighty force.
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HumansHow scientists can get a better picture of our extinct relatives
Facial reconstructions of extinct species have historically been more art than science. Some researchers hope to change that.
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GeneticsEurope’s ancient humans often hooked up with Neandertals
DNA from ancient bones shows humans and Neandertals were regularly mixing genes by about 45,000 years ago.
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FossilsRhinos, camels and bone-crushing dogs once roamed Nebraska
Scientists digging into the remnants of an ancient watering hole in Nebraska discovered evidence of an Africa-like savanna, complete with rhinos.
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LifeScientists Say: Genus
A genus is a group of closely related species. It’s the first part of the two-part system called binomial nomenclature, used to name living things.
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LifeLet’s learn about dogs
From learning the names of their toys to sniffing out viruses in human sweat, dogs are far more than household pets.
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PlantsDinosaur-killing asteroid radically changed Earth’s tropical forests
The asteroid collision initially reduced the diversity in what had been sunny tropical rainforests. In time, the forests would become permanently darker.
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FossilsScientists Say: Dinosaur
Dinosaurs emerged between 243 and 233 million years ago. While some died out 66 million years ago, others are still with us — birds.
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FossilsAn ancient hippo-sized reptile may have been a speedy beast
An Anteosaurus was a hefty reptile with a large snout. Its fossil skull hints that it may have moved fast for its time.
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AnimalsScience and Indigenous history team up to help spirit bears
When scientists and Indigenous people work together, their efforts can benefit bears and people.
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AnimalsExplainer: Black bear or brown bear?
If you see a bear, check size, shape and more to find out what type it is.
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PlantsScientists may have finally found how catnip repels insects
The plant deters mosquitoes and fruit flies by triggering a chemical receptor that, in some animals, senses pain and itch.