Researchers from the Australian National University used seismic waves generated by earthquakes to peer into the Earth's mysterious molten ... This donut-like structure runs parallel to the ...

Nobody has ever journeyed to the centre of the Earth, but by studying shockwaves from earthquakes, physicists have been able to work out its likely structure. At the heart of the Earth is a solid ...

Scientists at the Australian National University have made a highly unusual discovery thousands of miles beneath the Earth's surface: a doughnut-shaped structure within our planet's liquid core.

This exceeds the size of the near-300-km-wide Vredefort impact structure in South Africa, which to date has been considered the world's largest. Related: 10 Earth impact craters you must see The ...