Bears don't move much all winter long, but people are advised to get up frequently during a long flight to prevent blood clots. A new study uncovers why this discrepancy exists, and how it might lead to safer replacements for blood thinners.
The Immune System s Weirdest Weapon msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
The Super-Soldier Cells Hiding in Your Pus theatlantic.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from theatlantic.com Daily Mail and Mail on Sunday newspapers.