Thanksgiving is Thursday, and that means the beginning of travel season. Reports of crowded airports and delayed flights are sure to follow. Wolfram Alpha, the self-described “computational knowledge engine,” has come up with a new function that lets you figure out what airplanes are flying over you. Type in “flights overhead” in its search area, wait a few seconds and you can see exactly when Mother will arrive. Of course now you really don’t have any excuse for being late to the airport.