(n.) Microbes are amazing little organisms, they are everywhere and we couldn't eat or breath without them. Microbes are living organisms like humans are, but they are obviously different. For example microbes are made of one single cell while humans are made of over 10 trillion. Another difference is their size; microbes are so small that billions can fit into the head of a needle. The most interesting fact about microbes is that they are the oldest form of life on earth. Microbes are incredible survivors because of the different kinds of conditions they can live in and the different things they can eat. For example, microbes can live in very hot places (up to 113 ° C).