Do you know the story of the Titanic?
This is the Titanic. It was the biggest ship in the world. People thought that the Titanic could not sink. They were wrong.
Photo Credit: GL Archive/Alamy Stock Photo
Look at this bridge! This bridge helps people cross a river. It … read more
Scientists look to nature for ideas. This is called biomimicry. … read more
There are different types of electricity. One type is called … read more
©2017 McGraw-Hill Education. All Rights Reserved.