Scientists who study forests say they've discovered something disturbing about the way prolonged drought affects trees.
It has to do with the way trees drink. They don't do it the way we do — they suck water up from the ground all the way to their leaves, through a bundle of channels in a part of the trunk called the xylem. The bundles are like blood vessels.
When drought dries out the soil, a tree has to suck harder. And that can actually be dangerous, because sucking harder increases the risk of drawing air bubbles into the tree's plumbing.
There have been a number of books about great Jewish athletes, starring legendary baseball players like Sandy Koufax or Hank Greenberg, the "Hebrew Hammer." But a new book doesn't focus only on Jewish players — it looks at the myriad ways Jews have contributed to the American athletic landscape. Jewish Jocks: An Unorthodox Hall of Fame is a collection of essays compiled and edited by Franklin Foer and Marc Tracy of The New Republic magazine.
Foer and Tracy join NPR's Linda Wertheimer to discuss the rise of Jews in big-league sports.
Director Ang Lee has a surprising affinity for the Indian hero of Life of Pi — that's his name, Pi, and he's seen at several ages but principally as a 17-year-old boy adrift on a lifeboat in the South Pacific. He's the lone survivor of a shipwreck that killed the crew, his family and a variety of zoo animals his father was transporting to North America for sale.
Actually, Pi is the lone human survivor. He shares his boat and its dwindling food supplies with a man-eating Bengal tiger.