In the arid deserts of Ethiopia, a geological marvel has been quietly unfolding since 2005—a 35-mile-long fissure known as the East African Rift. Far from being a mere curiosity, this rift holds the potential to drastically alter the geography of our planet,

A new, detailed probe of Earth's heart reveals that the rotating inner core doesn't just change in rotation speed – it also appears to change in shape, with subtle variations appearing in the way acoustic waves propagate through the planetary center.