In the Viking era, boats from what is now Denmark travelled west across the North Sea to invade what is now Great Britain, but boats from what is now Sweden

TGF-beta is a protein which lets some cells boss other cells around. It’s manufactured and released by some cells, and other cells change what they are doing when they notice

Oxygen free radicals affect Dupuytren’s fibroblasts: high levels are toxic, but not only do slightly elevated levels stimulate fibroblast activity, active fibroblasts actually produce oxygen free radicals. Which is the