There’s much we may never know about our earliest ancestors, like why we started to walk upright and how we managed to create structures that seem to defy the engineering capabilities of the time. 

Stonehenge remains one of these great mysteries, with experts around the world divided over why exactly the prehistoric monument was built.

Now, to add to this age-old confusion, it has emerged that a similarly enigmatic stone structure has been found beneath the waters of Lake Michigan in the US.

Not only that, but this underwater creation is around 5,000 years older than its British counterpart.

The site was discovered in 2007 by a team of archaeologists led by Mark Holley, a professor of underwater archaeology at Northwestern Michigan College.

Holley and his colleagues were conducting a survey of the lake bed when they chanced upon a series of large stones, arranged in a circular pattern, just off the coast of Traverse City, Michigan.