It seems we now know more about outer space
than we do about the Earth’s core. This is because temperatures are so high at the centre of the
Earth that human beings have not been able to take a close look at it. However, new methods of
analysis may soon change all that. The seismic waves created by earthquakes and volcanic
eruptions penetrate the Earth's layers at different speeds. It is now hoped
that by studying these waves, scientists will be able to make new discoveries and solve
some of the mysteries of the internal structure of the Earth.