Paragraph 1
The Earth contains
that are yet to be unravelled. They focus on how Earth formed, and what is at its
. A recent study has
as to what shaped our planet at the
of the solar system. Scientists have evidence that
amounts of a rare,
form of the gas helium may be trapped inside Earth. It is called helium-3. Scientists believe this helium-3 is from a
cloud of gas and dust that gelled to create different
. The gas has remained locked inside Earth's
for billions of years. It is occasionally released in volcanic
.
