Wherever trees grow, sooner or later their leaves get wet. For trees in wet environments, this can be a problem if films of water cover their stomata. These tiny pores allow carbon dioxide to enter ...

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 making a case for putting a little more thought into your leaves.

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 ...