Why is the sky blue? Part 2

Where are all the dinosaurs, what are people made of, and why can't we fly? We arm parents with 25 answers to children's tricky science questions.

26) How do planes fly?

Their wings have to be, well, wing-shaped! The typical wing has a flat bottom and curved top. When air passes over the wing it takes longer to cross the top than the bottom, so the air has to travel faster over the wing. When air speeds up its pressure falls, so the wing naturally wants to rise into the area of least pressure, which gives the plane ‘lift’.