NATURAL WORLD: Reuters has collected their best and most compelling photography from 2017. Here' a look at the top images of the environment and the natural world. Check back for more collections through the end of the year. Pictured, the Norther Lights fill the sky near the village of Pallas in Lapland, Finland September 8, 2017. (Photo: Alexander Kuznetsov/Reuters/All About Lapland)