9. We have all seen the face on Mars but, despite much evidence to the contrary, many people still believe it is an alien creation. In the most recent flyby of Mars, NASA was able to get a much clearer picture (which you can see above). Those who still believe that it is a non-naturally made hill are suffering from pareidolia.
10. Mercury is the closest planet to the sun but, despite this, it is not the hottest. The planet with the highest mean surface temperature is actually Venus – a consequence of its mostly carbon-dioxide atmosphere.