1. Eyes always remain same in size since the time we are born and till the moment we die, unlike our ears and nose that are constantly growing throughout our life.
2. Lightning bolts can sometimes be hotter than the sun. (About 50,000F)
3. Mercury is the only planet whose orbit is coplanar with its equator. Venus and Uranus are the only planets that rotate opposite to the direction of their orbit.
8. The human brain is capable of creating more ideas than the equivalent to the number of the atoms in the universe.
10. If we imagine that you were able to hold the milky way galaxy in your hand, the nearest galaxy to you would be a walk of about 3 months away.