In case there weren’t enough theories on how life started on our planet, researchers decided to add one more to the list. It turns out the first life forms didn’t originate on Earth but, instead, were carried on particles of space dust. Researchers explored the origin of the space dust, and it could have been Mars. Therefore, life on Earth might actually be alien life.
Space dust could have carried life
Researchers believe that space dust was the one that triggered life on planet Earth. These particles travel through space at speeds which can reach 70 km per hour, and often end up hitting our planet. Aboard the particles, there were microscopic life forms, which found an environmental suitable for them to thrive.
This theory sounds crazy enough, as it suggests that life on Earth is actually alien life. If it were true, the theory indicates that some life forms might be present on other planets as well, or that microorganisms from Earth hopped on these particles and were transported somewhere else in the universe.
This sounds really hard to believe, but we might have enough evidence that such space dust exists. ESA scientists found evidence that plenty of material from Saturn actually originated on one of its moons, Enceladus. Also, they say space dust is widely present across planetary systems.
There is some scientific basis on the theory of life coming from space
This is not the first time when researchers explore the possibility of life on Earth coming from outside the planet. Previous studies offered hypotheses which suggested life was brought on our planet by an asteroid which collided with it, or aboard particles originating from Mars.
Water is essential for the presence of life, and it was plenty of it on our planet. However, other ingredients are necessary for life to proliferate, and these are molybdenum and boron. The initial conditions present on Earth couldn’t have produced these substances, so it’s possible that they have come aboard space dust particles, together with several microorganisms.