Research at one of the world's clearest, cleanest lakes suggests the problem of microplastics is widespread in freshwater systems and not just in oceans.
Most people don’t associate the US Pacific Northwest with earthquakes, but maybe they should. It’s home to the 600-mile (1,000-km) Cascadia megathrust fault, stretching from northern California to Canada’s Vancouver Island.
Duck-billed dinosaurs - hadrosaurids - were common 80 million years ago. Now scientists have discovered a complete skull of a previously unknown species of hadrosaurid, which sported unusual skull and face features.
Birds spend a lot of time and energy singing, but they don't do it the same way in every season of the year. And some can't sing at all. What's the purpose of birdsong?
Last month was the planet's hottest June in NOAA's climate record, which dates back to 1880. Also last month, Antarctic sea ice coverage shrank to new record low.
They outlived mammoths and saber-toothed tigers. But new research suggests that without dramatic action to reduce climate change, Joshua trees won’t survive much past this century.