What is Dark Matter? What is Dark Energy?

What is Dark Matter?  What is Dark Energy?

Dark Matter and Dark Energy are two of the greatest mysteries in science. According to this video, many scientists think that the universe is made up of only 5% what we can see, with Dark Matter making up 25% and Dark Energy 70%. That’s because scientists calculate that observable matter does not have enough gravitational pull to keep a galaxy together.  This video shows how scientists think they may have solved the mystery.