In March, the overhauled SAT will make its debut and many parents and students are more than a little nervous about the changed test.

Is recovering from ACL surgery about to get faster? If a series of experimental operations on people turn out as well as they did for pigs, it just might.

The 30 day exercise challenge is increasingly popular, especially as an alternative to New Year’s resolutions, which often fail this time of year. The pitch is to stick with a commitment for a month, whether to reach a specific benchmark, mix up a routine or try to establish an exercise habit.

Much more is highlighted in A Look Ahead.