In the late seventeenth century, a Dutch cloth merchant named Antonie van Leeuwenhoek built some of the most powerful microscopes of his time. Each o had on a sin tiny le, but i could ma objects lo more th two hun times lar. Looking through his lenses, he became the first person to see bacteria and other tiny living things. He described his discoveries in hundreds of letters to scientists in London. At first, many of them doubted his reports, but his observations were later confirmed.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.