Solidcore has over 5.1 million views on TikTok, and what feels like even more comments from people saying it’s the hardest workout they’ve ever tried. The class is a high-intensity, low-impact ...

That solid iron inner core of Earth may still hold liquid iron, according to a new study from the University of Utah. Scientists have used seismic waves to research Earth’s inner core, uncovering a ...

The solid inner core (610 km radius) found by Huixing Bi and colleagues is hugely significant. The very presence of a solid inner core shows that crystallization and solidification is taking place as ...