Heart, Research | featured news

Could exercise actually be bad for some healthy people? A well-known group of researchers, including one who helped write the scientific paper justifying national guidelines that promote exercise for all, say the answer may be a qualified yes.

Staying young at heart has taken on a new meaning. Newborn mice can mend their own hearts, thanks to the replication of healthy cardiac cells. The findings, published today in Science, reveal striking similarities in the way that fish and neonate mammals rejuvenate their organs.