Cole Trickle performs his first ride around the racetrack and finishes with an impressive time. As the car travels around the track, the sound of the motor changes in pitch.

Glaciers appear on almost every continent. However, they are rapidly melting due to the warming climate.

Dr. M Jackson films Iceland's Glaciers by boat.

Phil demonstrates potential and kinetic energy using an old traffic controller and a bagel. He explains the difference between the two types of energy.

Buster Beaker explains how high and low tides are affected by the gravity of the moon and the sun. He illustrates the phenomenon using a cookie, a mushroom, and a lemon.