A recent research discovered that microbes existed on our planet even more than 3.5 billion years ago. Scientists reached this conclusion after looking at the fossils of some ancient microscopic life forms, which were the oldest evidence of life on our planet. Apart from showing that life started earlier, the findings are important for the prospect of life forms on other planets.
The first microbes on Earth are a lot older than we thought
The first beings on Earth came to life through abiogenesis, which is roughly translated as the birth of life from no life. These fossils contained some microbes which fed with methane, and the fact that they were 3.5 billion years old suggest life came into being much earlier than scientists presumed. Earth is 4.5 billion years old, so these microbes must have been the result of a billion years of evolution.
This is interesting to look at in comparison with other planets. Life evolved pretty quickly on our planet, and in some conditions which were far from friendly. If it was possible on early Earth, maybe the same thing happened on other planets as well.
Some life forms can survive even in the most extreme conditions
Our planet is the only example we have when looking for life forms outside of Earth. Astrobiologists spend their time looking for non-intelligent life on planets with suitable conditions. They study the places where life can be found on our planet so that they could know where to look on different worlds.
Sometimes, it seems impossible that some life forms might exist somewhere else in the universe. However, there exists a group of being called extremophiles, which can survive even in the most unthinkable conditions. These primordial microbes are a good example of such creatures. If they could come into being on Earth’s early conditions, researchers believe they might be able to exist anywhere.