Evidence-based medicine

In his new job overseeing health coverage for 1.2 million workers and their families, Atul Gawande says he hopes to find specific ways to make health care more efficient and the solutions exportable. Dan Bayer/The Aspen Institute via Flickr hide caption

The notion that every dog or cat should be neutered at 6 months isn't based on evidence, says veterinarian Brennen McKenzie, author of The SkeptVet blog. It depends on the breed and other factors. Talk to your vet, he advises, about pros, cons and timing. katoosha/iStockphoto/Getty Images hide caption

The physical therapist will advise, but you're going to have to do the work. iStockphoto hide caption