Using X-ray computed tomography scans, scientists have produced a 3D model of a spiderlike arachnid that lived some 305 million years ago. But it is missing one crucial feature shared by all modern-day spiders. By Story Hinckley, Staff March 30, 2016 Scientists have described a 305-million-year-old fossilized creature that looks exactly like a modern-day spider. But it is not… Continue reading Where do spiders come from? A tiny, prehistoric ‘almost spider’ offers clues.