could prove otherwise. While many have believed that the Earth’s inner core is made up of layers, it has often been illustrated as a metal pinball of iron and other metals. According to this research, though, it has several grooves along it.
This allowed the researchers to detect very tiny signals from underground nuclear explosions, which gave them a way to measure the grooves that are now believed to appear in Earth’s inner core, giving it a strange texture that isn’t quite smooth or even. Similar experiments in the past which sought to map the inner core only relied on one seismometer or focused on limited patches of the core.The signal that comes back from the inner core is exceptionally tiny, the researchers note.
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