There were domestic dogs in North America 10,200 years ago, according to a re-examination of an ancient dog skeleton that looks like a small English setter
Two common US fish have evolved different body shapes to help them survive in the fast-moving streams in built-up areas
Two common US fish have evolved different body shapes to help them survive in the fast-moving streams in built-up areas
As lava from Kilauea plunges into the Pacific Ocean, clouds of hot acidic steam are being blasted off – and the eruption shows no signs of slowing down
The Kilauea volcano is unlikely to erupt explosively, but it will probably keep pumping out devastating lava for many days to come
Levels of nitrogen oxides in the air are still falling across the US, but satellite measurements show the reduction has slowed down unexpectedly since 2011
A draft of a US government report argues that the country could reap huge economic and health benefits by cutting greenhouse gas emissions
Rising seas are already boosting the flood risk in places like San Francisco, but the problem is even worse than that because land is also subsiding
The eastern US has shivered through freezing temperatures while Australia has sweltered in a colossal heatwave, and both events may be linked to climate change
After striking the Caribbean islands and leaving several close to uninhabitable, Hurricane Irma has made landfall in Florida and caused untold damage