Archimedes thought of buoyancy when he took a bath (archimedes principle)
The Wright brothers saw birds with wings, thought of airplanes
Watt saw the steam of boiling water, and thought of the steam engine
Bai Juyi collected materials for his work every day and put them in jars, which provided a lot of materials for his later poetry creation
. Cambridge University is temporarily closed. Newton was also forced to leave school and return to his hometown. Legend has it that Newton was sitting in the orchard at dusk the following autumn, and suddenly a ripe apple fell from the tree. This ordinary incident touched Newton's mind and reminded him of a very important problem in science.
at that time, he was studying the gravity of the earth. After his preliminary research, he came up with a bold scientific hypothesis: the earth not only attracts apples, but also attracts all objects on the surface of the earth, and it also attracts distant moons and other stars. He believes that this attraction can reach far, far places; But as the distance increases, the attraction will gradually weaken.