Bacteria: Reading Practice 8 (discussion)
One day in 1676, a Dutch scientist named Antony van Leeuwenhoek looked through a microscope what no one had ever seen before: bacteria. Bacteria, very tiny living things, exist everywhere in the environment and can only be seen through a microscope. On the one hand, bacteria are harmful. The word germs is used to describe harmful bacteria. Germs… Read More »
