Scientists have discovered a vast donut-shaped structure hidden within Earth which could hold the secret to why life was able to form on our planet.

As such, they aren’t ruling out other possibilities. But, for now, the signs point towards the remains of an ancient structure, possibly an ocean floor, surrounding Earth’s core.

Scientists have unravelled a doughnut-like structure buried deep within Earth's swirling outer core of molten metal. The exciting discovery was reported in a new study published in Science Advances.

Earth and Planetary Science Letters (2020). [2] Tomographic inversion for three-dimensional anisotropy of Earth’s inner core. Physics of The Earth and Planetary Interiors (2008).