During the next two weeks, you can help build a map of global light pollution, assisting scientists and astronomers as they monitor the loss of virgin night skies. You just have to look at the stars and write down what you see — or, more likely, what you don’t see.
Imagine if every time you needed to officially identify yourself you had to be sedated and knocked out cold. This might sound only slightly less stressful than checking through security at the airport, but for animals being tracked by wildlife authorities and researchers it’s a regularity that is not only stressful, but potentially harmful.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.