Sheep's immune system anything but sheepish
Thursday, October 28, 2010 - 16:30
in Biology & Nature
On the Scottish archipelago of St. Kilda, the Soay sheep may not have any natural predators, but they do have the elements to contend with: a lack of food, brutal weather that can kill off half the population at a time and parasitic worms that live inside their bodies and suppress their immune systems.