Researchers investigate microplastics in D.C.'s waterways

A research team from American University has spent the last three years collecting samples from several freshwater streams that feed into Washington, D.C.'s Anacostia River. They have been looking for microplastics.

In a changing ecosystem, Yellowstone grizzly bears are resilient

Grizzly bears in the Greater Yellowstone Ecosystem have been able to gain the body fat they need for hibernation even as population densities have increased and as climate change and human impacts have changed the availability ...

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