We all know that you can convert heat into electricity. Usually, you do that with some form of steam, but there are other methods, too, including thermocouples. If you’ve ever seen something ...
But in our connected world, perhaps it pays to consider updating ... us all get prepared to survive a few days in a digital dead zone.
If you’re looking for eco-friendly gifts, these flip-flops may just be the most eco-nomical in the world ... or camping trip. This nature-inspired repellent creates a 15-foot protective zone ...