Today's Health/Science: wing damage, oral-cancer test, 'missing link' fossil, infants' body language

After a series of provocative discoveries in recent months, scientists believe bats in the Northeast might be in greater peril from a mysterious sickness than originally thought.

A relatively new screening tool allows dentists to better gauge whether a patient is in the early stages of oral cancer by looking at the mouth under a special light. But the test may be overused, and it's not yet clear whether it justifies its price tag.

Tiktaalik is one of the most spectacular fossils in the entire evolutionary record. If only it were complete.

It's been said that Heidelise Als revolutionized the field of neonatology, forcing a paradigm shift in the entire idea of how we care for premature infants. And she did so not as a physician but as a psychologist who constantly asked why we weren't reading the body language of the infants who "will tell you what works for them in no uncertain terms."

Also in Health/Science, is the new test for osteoporosis better than a bone density test and what exactly is a blind spot, and why do we have one?