Space junk is an increasing problem. With more countries and private companies entering space, more junk is accumulating and no one is in charge of cleaning up.
A space rock that came to rest in the Sahara desert is more than 4.5 billion years old. It helps scientists understand the conditions of our early solar system.
Scientists are using GPS, satellites and statistics to track and protect giraffes. Read more about the efforts in Africa to protect these iconic animals.
Scientists have found that excess light at night is a form of pollution that disrupts the natural rhythms of wildlife and plants. Learn to dim the lights, here.
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.