Deep beneath our feet, at a staggering depth of over 5,100km, lies Earth’s inner core — a solid ball of iron and nickel that plays a crucial role in shaping the conditions we experience on the surface. In fact, without it we’d be unlikely to even exist.
But despite its significance, it’s a bit of a puzzle how it formed and developed. We don’t even know how old it is. Luckily, mineral physics is bringing us closer to solving the mystery.
