Chronic stress and lack of sleep seem to be the new normal for American teens. Most teens are not getting the 9-10 hours of sleep a night that their bodies require. As a result, some schools are purchasing nap pods—reclining chairs with a dome that blocks out light. The idea is that students can use the pods for 20-minute periods of rest and relaxation. These naps can boost memory and attention and help students perform throughout the day. Listen to learn more about the challenges facing modern teens and how nap pods can help.
To propel themselves through the water, swimmers use different strokes to control drag and lift. But which stroke is the fastest? Some experts have pinpointed the fish kick — a version of the dolphin kick — as the speediest swimming style. Swim coach and engineer Rick Madge dips into the fluid dynamics behind these strokes.