<human>:  Who was the first person to see bacteria with a microscope?
<bot>: Antonie van Leeuwenhoek was the first person to see bacteria with a microscope. He did this by creating a new microscope, which had a higher magnification than the ones that were available at the time. He also made improvements to the microscope, such as making the lenses out of glass instead of wood, which made them more durable.