1) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

2) The word "oxygen" contains two vowels: O and E.

3) The destructive power of cyclones is often attributed to their storm surge, which is a rise in sea level caused by the strong winds and low atmospheric pressure.

4) The eye of a cyclone is a region of calm, relatively clear skies and light winds at the center of the storm.