Airplane wings have a special shape. They are curved on the top. They are flat on the bottom. Airplanes can fly because of this special shape.
Photo Credit: National Air and Space Museum, Smithsonian Institution, Donated by Charles A. Lindbergh
In the Know
Follow the Sun
Many plants move toward the Sun. One side of the … read more
In the Know
The Teenager Who Explored the South Pole
The South Pole is at the bottom of the Earth. … read more
In the Know
What Is Air Quality?
This map shows a day when the air quality was … read more