1 00:00:00,000 --> 00:00:07,000 Hi, I'm Jessica with more science news you can use. 2 00:00:07,000 --> 00:00:09,000 How can airplanes fly like birds? 3 00:00:09,000 --> 00:00:13,000 But airplane wings can't move like bird wings. How can a plane fly too? 4 00:00:13,000 --> 00:00:18,000 Well, airplanes weigh a lot more than birds, so airplanes need efficient wings in order to fly. 5 00:00:18,000 --> 00:00:23,000 Wings have a special shape called an airfoil. This shape forces air to move over and under the wing. 6 00:00:23,000 --> 00:00:26,000 How does this shape help birds and airplanes fly? 7 00:00:26,000 --> 00:00:28,000 One explanation comes from a scientist named Bernoulli. 8 00:00:28,000 --> 00:00:31,000 He discovered that moving air makes different pressures on wings. 9 00:00:31,000 --> 00:00:34,000 Air moves faster across the longer top part of the wing. 10 00:00:34,000 --> 00:00:38,000 This makes low pressure on top. High pressure forms under the wing. 11 00:00:38,000 --> 00:00:42,000 I can't stand the pressure. Tell me how this makes an airplane fly. 12 00:00:42,000 --> 00:00:46,000 The high pressure under the wing pushes it up into low pressure on top. 13 00:00:46,000 --> 00:00:48,000 This lifts the entire airplane. 14 00:00:48,000 --> 00:00:53,000 To learn more about wings, air pressure, and other theories about flight, check out our website. 15 00:00:53,000 --> 00:00:57,000 Until next time, I'm Jessica with cool aeronautics news you can use.