Johann Bernoulli was a very smart man who lived a long time ago. He loved math and was really good at it! So good, in fact, that he became known as one of the greatest mathematicians of his time.
Johann Bernoulli was born in Switzerland in 1667, and he grew up with a big family who also loved math. He went to school to learn more about numbers and equations, and he studied really hard.
One of Johann Bernoulli's greatest contributions was something called the "Bernoulli principle." This is a very important idea that says when air or water moves across a surface, it can create a force that pushes or pulls things in a certain direction. We use this principle to help airplanes fly and boats move through the water!
Johann Bernoulli also wrote lots of books about math and science, and he taught many students who went on to become brilliant mathematicians themselves. He had a very curious mind and was always asking questions to learn more about the world around him.
Overall, Johann Bernoulli was a very important person in the history of math and science, and his ideas are still used today to help us understand and solve problems.