A large body of research shows that older people who keep exercising at old age have a much better immune system than their less active peers. In some cases, certain parts of their immune system can even resemble that of a 20-year-old.
Imagine a field of microscopic flowers that can fold, unfurl, and even kick off a chemical reaction without a gardener in sight. Researchers at the University of North Carolina have at Chapel Hill built just such shape-shifting “soft robots,” and the most interesting part isn’t what they are, but what they might be able to do.
