Have you noticed a spike in your electric bill? It could be your AC. Check out these tips for lowering your energy use while still keeping your home cool. Alexandra Jones is a CNET contributor who ...

We walk here, we walk there, we walk everywhere. Maybe you’re headed to work or to lunch in a busy city. You’re expending energy, and the exercise is good for you. But what if, on top of that, we ...

Studies of neural metabolism reveal our brain’s effort to keep us alive and the evolutionary constraints that sculpted our most complex organ. You’ve just gotten home from an exhausting day. All you ...