Whether from playing too much basketball or jogging in ill-fitting sneakers, we've all had blisters. But what are blisters, and how do they form?
Blood is much more complicated than you might think.
Although Everest had first been climbed in 1953, this was the first successful ascent to be made without supplemental oxygen.
Those tiny dots are actually blood cells moving in the retina of your eye.
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This means that instead of staying in one place, the cancer cells migrate from their original site to other parts of the body.