ScienceAmazon wasn't always so lush and green, it was downright barren at one point Much of today's Amazon rainforest was once much drier and devoid of trees, researchers say. Region would have been more like African savannah until 2,000 years ago, they say.by Jim Algar
Science'Spiders Alive' exhibit of Natural History Museum features giant tarantulas and moreby Aaron Mamiit
ScienceManatees may move from endangered to threatened list: Could take 12 months for it to happenby Vamien McKalin