Paragraph 2
After Dr Park studied the
earthquake, she spoke about why she found the Earth's core so
. She said: "Even though the
makes up the largest part of Earth, there's still a
we don't know about it." She added: "There's a lot more we can learn by using
earthquakes as a way to probe these
." Ms Park explained the
of understanding more about the centre of our planet. She said: "We want to know
how fast the mantle flows because that influences the evolution of the entire Earth. It affects how much
the planet retains for how long, and how the Earth's materials are cycled over time. Our current understanding is very limited and includes a lot of
."
