Having already looked at the origins of the universe, the next animation from Reasonable Faith looks at just how ridiculously, infinitesimally, mind-bogglingly improbable it is that this universe could then go on to support life.

From galaxies and stars to atoms and subatomic particles, the structure of our universe is determined by a vast array of fundamental constants and quantities. Scientists continue to discover that these constants all fall within an incredibly narrow life-permitting range.

The slightest deviation in any single one of these values would have resulted in a universe incapable of hosting any kind of life. Anywhere. No stars, no life, no planets, no chemistry … no us.

Wherever physicists look, they see examples of fine-tuning.”

Sir Martin Rees, Astronomer Royal

Take the force of gravity as a quick example. If the gravitational constant varied by just one in parts we simply wouldn’t exist. Just so you get the idea, the number of seconds that have ticked by since time began would number something like . And this is just one of dozens and dozens of similarly finely-tuned constants that, together, mean you are reading this right now.

So come on a whistle-stop tour of the universe to discover the true extent of this fine-tuning, before asking the natural question that arises from it. Why is our universe fine-tuned to support life? Is it by necessity? By chance? Or by design?