First new global map of Earth at night since 2012, dubbed Black Marble. It shows city lights, boats on the water, how people follow geography, population patterns and more.
Thanks to years of drought followed by above-average rainfall, California is enjoying a fantastic wildflower superbloom in 2017. See before-and-after space images here.
The enormous ring of light that appeared in the night sky on April 2 - above a thunderstorm in the Czech Republic - was a rare and fleeting lightning phenomenon.
Audubon website lets you enter your zip code to see a list of the best bird-friendly plants for your yard. Plus a free app to identify the birds you see.