The world is big, we can not understand the whole world, but we still have to find the unknown, because the unknown can led us find and discover, make us know more about our world and change it, the unknown is always there, neither you find or ignore it, it will influence our life. To make our life better, we have to understand the unknown.

Many thing are unknown at first.....

People fond way the rave can move better, so they developed the wheel. This led to the cars and trains.

People found way the sun goes up and down, so they thought out the astrophysics. This led to the basic laws of physics.

People found way the cable can transfer the information, so they developed the telephone, and this led led to the video technology.

People...................

The finding will never stop.