Redwood trees have two types of leaves, one to make food and the other to absorb water, found a new study. It's the first study to estimate whole-crown water absorption in a large, mature tree. The ...

Add Yahoo as a preferred source to see more of our stories on Google. Oh, lettuce. It beefs up salads and adds a final healthy flourish to your plate. But honestly, it can get a little boring. So I’m ...