Near the Arctic Circle, in northern Alaska, is where forests give way to tundra. Researchers are looking at how the warming climate might affect the ecology of this northern boundary.
A new analysis of hundreds of studies says that almost every aspect of life on Earth has been affected by climate change ... and that's not good news for humans.
It'll be the hottest year on record unless the final weeks of 2016 are the coldest of the 21st century so far, according to the World Meteorological Organization.
Members of the EarthSky community - including scientists, as well as science and nature writers from across the globe - weigh in on what's important to them.