Turns out a little radiation is good for you -- if you're a tree at least Scientists have discovered that tree growth appears to be spurred by increased amounts of Galactic Cosmic Rays (GCRs). (Source: Sigrid Dengel) Scientists often see the need to confirm what we already know. For example, every 11-year-old (or 41-year-old) comic book fan living with their parents knows radiation makes organisms grow bigger and stronger. However, for those who don't read comics or have hyperactive imaginations, that presumption turns out to be somewhat true -- for trees at least. A new study from the University of...