Season 4, Episode 1 of 13

A half-hour of our hottest investigations kick off the season! En garde: Paula and Alyssa study sword science with a fencing investigation. Kha and Peta, 12-year old martial arts athletes, get their kicks as they determine how different tae kwon do movements challenge their bodies' skeletal and muscular systems. And DRAGONFLY TV asks: How can you pedal your bike 80 miles per hour?

Previously Aired

10:30 a.m.
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