科学家们通过将动物们缝合在一起的实验,发现年轻动物的血液可以更新衰老的组织以使年老动物获得重生。目前,他们正在测试这一方法是否能够应用于人类。两只小鼠并肩相偎,一起啃食喂给它们的食物。当其中一只转向左侧,我们便可以清楚地看到,食物并非它们分享的全部:原来它们的前后腿都被绑在了一起,身体上有一排整齐的缝合线,将它们的皮肤连在一起。然而,就在皮肤下面,两只小老鼠还有另一层更深入的连接:它们的血液彼此相通,通向彼此的心脏。 By stitching animals together, scientists found that young animals’ blood can renew aging tissues to regenerate older animals. Currently, they are testing whether this method can be applied to humans. Two mice cuddled side by side, gnawing food fed to them. When one of them turns to the left, we can clearly see that the food is not all that they share: it turns out that their front and back legs are tied together and the body has a neat row of sutures that connect their skin to together. Just below the skin, however, the two little mice had another, deeper connection: their blood connected to each other and to each other’s heart.