This week ... an interview with the man who helped discover the oldest animal in the world, a 405-year-old clam! Also, a look at 700-pound rocks that move ... seemingly on their own. In Death Valley, one of the weirdest looking places on earth, renown adventure writer Tim Cahill tells us all about his recent trek there, a story featured in the November issue of National Geographic magazine. And as always, a roundup of the week's top science and nature stories, plus a quiz from our very own Quiz Guru, Mat Ramsey.
