Environment
Cheatgrass thrives on the well-lit urban night scene
Middle-grade campers team up with ecologists at Denver University to show that streetlights boost the growth of a reviled invasive species.
Ecosystems
Articles on ecosystems
More Stories in Ecosystems
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AnimalsUrchin mobs can literally dis-arm a predator
Urchins are important herbivores — but not strict vegetarians. When hungry enough, they may even rip apart their predators for lunch.
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EarthOnly 3 percent of Earth’s land is unchanged by people
A sweeping survey of land-based ecosystems finds that very few still support all the animals they used to. Reintroducing lost species could help.
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EcosystemsAnalyze This: Invasive species cost the world billions each year
A new study estimates that invasive species have cost the world more than $1 trillion since 1970. That’s almost certainly an underestimate.
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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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EcosystemsUrchin takeover underlies California’s vanishing kelp forests
Some 95 percent of kelp forests along its northern coast are gone. Meanwhile, sea otters are helping slow the loss of surviving kelp farther south.
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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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AnimalsChanging people’s behavior can make bear life better
Black bears don’t always live life on the wild side. More and more, they live near people. Here’s how people and bears can get along.
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ClimateChanging climate now threatens northern lakes year round
Lakes in northern climes are getting warmer, and that’s not good for people, plants or animals.