Mercury is the only planet which doesn't rotate exactly once a year. The ancient Greeks named the planet after their quick messenger named Hermes who is also the Roman god named Mercury.
Mercury is the closest planet to the sun and is the smallest planet in the solar system. It takes 1407.5 hours for Mercury to rotate around its axis.
The mass of mercury is 3.285  10 23 kg and out of all the planets mercury is the smallest 
The gravity on mercury is 3.7 and on Mercury you will weigh 0.39 pounds 
​It takes 88 days for Mercury to orbit the sun.
Mercury's atmosphere is very thin.
Mercury is a bit like Earth's moon and Mercury has no moons or any rings.
People can not live on mercury because you will burn 
​Mercury is 4.503 billion years old 

every thing you want to say and what you want to do is in your prefrontal cortex and its at the top and the front of the head and brain. The hippocampus