Now imagine it only took a few minutes to do, and you could do it anywhere. There is. It’s called the cross-crawl, and it’s for real. Neuroscientists have long known that cross-body movements help the ...

Most adults don't remember learning how to crawl. But Alexandra Greeves, 31, will never forget. "I had to concentrate on it," recalls the Bethesda, Md., resident, who struggled with keeping her head ...