Alien life is behind the mysteries of the universe, according to a radical new theory.

Ancient non-human life forms morphed into the physical world and are the driving force behind mind-boggling quantum physics and phenomena like dark matter, according to a Columbia University astrophysicist.

The expert says our universe is the remains of intelligent alien life that controls all aspects of the physical world — from gravity to the speed of light.

The theory helps to explain the great mysteries of the cosmos and also answers why we have yet to find intelligent life beyond our planet, Professor Caleb Scharf says.

In an article for science journal Nautilus, the radical thinker wrote that alien life could exist in the behavior of subatomic particles and the expansion of the universe.

“Perhaps hyper-advanced life isn’t just external. Perhaps it’s already all around,” he said.

“It is embedded in what we perceive to be physics itself.

“In other words, life might not just be in the equations. It might be the equations.”

He points to a theory that suggests alien life forms intelligent enough to reach us will have already turned themselves into living machines.

Humanity too faces this prospect when our creations overtake our own intelligence — a point dubbed “singularity.”

Taking this a step further, Scharf says hyper-advanced aliens may have gone beyond turning themselves into machine creatures and gone as far as becoming a complex physical system.

“If you’re a civilization that has learned how to encode living systems into different [materials], all you need to do is build a normal-matter-to-dark-matter data-transfer system: a dark matter 3D printer,” Scharf explained.

His theory centers around the idea that we have not seen complex life apart from our own because it already exists around us.

“We don’t recognize advanced life because it forms an integral and unsuspicious part of what we’ve considered to be the natural world,” he wrote.

Here’s another theory about where aliens might be living: