Descarte

Descarte liked to lie in bed all of the time and figure things out. He liked to think about math. He was famous for making the Cartesian Co-ordinate system. He was lying in bed and he saw a fly on the ceiling. He wondered how to tell people where the fly was, so decided to make two lines; x and y.

The queen of Sweeden asked him to come and teach her math. One day, he was teaching her and when he was done teaching, he went back to his room through the rain. He caught pneumonia and in a week he died.

We call him the father of modern mathematics.

Anton van Leeuwenhoek

Anton van Leeuwenhoek wove material to earn money but he really liked science more. He made a microscope better than the earlier ones. You could see 270 times the real size of something. He saw bugs and water fleas with the microscope. We could not see them without the microscope. He saw the blood from fish and people. Our blood looked like circles. He experimented with all that he saw and he drew pictures of what he saw. He sent letters to people about what he discovered and he became very famous.

William Harvey

William Harvey was a doctor. King Charles was one of his patients.

William Harvey said that the heart was a pump and blood circulates through the body. He experimented with dead bodies, frogs, and other animals by using the Scientific Method. Not that many people believed him. They thought that sometimes people needed to bleed and they had too much blood. Getting rid of the "extra" blood when they were sick would help them get better. William Harvey said losing our blood probably makes us weaker, not better. Later on, a few other doctors experimented with dead bodies and animals too and they prooved that he was right all along.