Carve out a harder core—without doing situps—using a routine that spares your lower back. For decades, ab training meant situps, curling your upper body all the way up off the floor, rounding your lower
A dying firefighter brought them to Washington to convince politicians they really should never forget. WASHINGTON -- When Jon Stewart and a group of 9/11 responders walked the halls of Congress this week
Forget body language or eye movements. There are much better ways to identify the deceitful. This story is part of BBC Future’s “Best of 2015” list, our greatest hits of the year. Browse the full list.