Life Fossil of pregnant ground sloth discovered with fetus inside Found in a Brazilian cave, the remarkable specimen of a ground sloth fetus inside its mother offers a rare insight into the developmental biology of the extinct mammal NewsSubscriber-only
Life Spine of early crawling fish was becoming more like a land animal's Scans show that the spine and ribs of Tiktaalik, one of the first fish to crawl on land, had features that are more like those of early land animals than fish NewsSubscriber-only