3. Science is trying to reverse the aging process
Two rats—one old, one young—are stitched together. New blood vessels grow, fusing their circulatory systems. The old rat receives young blood. The young rat receives old blood. Young rat begins to show early signs of aging. Old rat appears to have gained new youth, health, and vigor. A grinning old woman whispers, "The circle is complete." (Probably.)
Ancient ritual to appease the angry gods, or the most metal science experiment ever?
It's the latter, which may not make you feel better. For decades, researchers have been observing the effect that young blood, and the specific proteins inside it, has on aging bodies. Results of their work show that introducing it into an animal's system can essentially reverse the aging process by rejuvenating all types of tissue, from the heart, to muscles, to the brain.