Paragraph 1
The natural world contains many
. The latest discovery is about how
waste could help treat
illnesses. Researchers analysed "pee crystals" that reptiles excrete to get rid of
. The crystals are a solid
of uric acid. This is created when the
breaks down
in food. It can be harmful. Too much nitrogen can lead to
problems like kidney
. Our bodies flush uric
waste away when we pass water.
