It’s hard to get a good night’s sleep when you’re camping. Air mats can be cold and wobbly, and foam mats are too heavy to be worth carrying. The NeoAir solves both problems. An aluminum-based film inside the mat both reflects heat back to the body and acts as a barrier to keep cold air against the ground. Inside, hundreds of strong nylon triangles create a light (only 14 ounces), stable 2.5-inch-thick cushion. $150; thermarest.com
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Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?