The micro-organisms, or microbes, alive today are the descendants of the very first life formed on Earth 3 billion years ago. Today, they are still the most common form of living thing in the world.
A single teaspoon of soil contains over 1,000,000,000 bacteria, about 120,000 fungi and 25,000 algae.
If all the microbes living on the Earth could be gathered in one place, they would take up more space than all the world’s animals!
