For a long time, scientists thought the Earth's inner core was a solid ball of metal, sort of like a planet within a planet that sits some 3,000 miles (4,828 kilometers) below the surface.

Earth’s innermost layer is a hot, solid ball of metal surrounded by a liquid metal outer core. For decades, planetary scientists suspected that the solid inner core deformed over time as it spun.

Maybe, this solid ball of metal wasn’t as solid as we previously thought. “As I was analyzing multiple decades’ worth of seismograms, one dataset of seismic waves curiously stood out from ...

And in a recent Instagram post, they shared three key movements for solid ball striking with your irons. Check them out below. You’ve probably heard the term forward shaft lean before — and ...