How does the 1973 oil crisis relate to winglets on airplane wings? Interested pupils view a video that explains why airplane wings have winglets. It turns out that the high cost of oil made more efficient wings a necessity.

Hummingbirds consume their weight in nectar every day. The video explains their unusual flying abilities. From holding their bodies perfectly still while flapping their wings in mid air in order to get the nectar to shaking off water...