Ottawa Senators sign new goalie Linus Ullmark to 4-year extension

The polar regions are some of the most important areas on the planet when it comes to understanding climate change, says Philippe Archambault, scientific director of ArcticNet, a network of research centres dedicated to studying the impacts of climate and socio-economic change in the Canadian North. That’s because the ice-covered surfaces of polar regions have traditionally acted as areas that reflect the sun back to itself like a mirror.“A good example I say to the general public is … if you have the sun in your face, that’s quite warm. If I put a mirror between you and the sun, you’re...