Have you ever stopped to think about what our world used to look like before humans started roaming the Earth and animals became what they are today? If your answer is “yes,” you’ve come to the right place. In this article, we’ll travel 3 billion years into the past to discover the early days of our planet and the life forms that appeared back then. Get ready to learn everything you always wanted to know about the origins of all the creatures that share the world with us!
In the beginning, there were microbes
About 3.7 billion years ago, our planet looked very different from what it does today. The environment was devoid of oxygen and high in methane, meaning that the Earth wasn’t a welcoming place for either plants or animals as we know them.
Still, life found its way. Scientists recently found a specific type of carbon molecule produced by living things in fossilized rocks. This mind-blowing discovery indicates that microbes got trapped in them billions of years ago.