A weird number of craters are located close to the equator, and the odds that this is random are incredibly low, researchers say.

And now, a new study published in the scientific journal Earth and Planetary Science Letters seems to show that Earth itself once had a similar ring. The new study asserts that Earth's ring formed around 466 million years ago and stuck around for around 40 million years before dissipating.

The research, led by Andrew Tomkins, a professor in the School of Earth Atmosphere and the Environment at Australia’s Monash University, took a close look at the ancient Earth, back in what is known as the Ordovician Period,