There are 8.7 million species of animals in the world! … read more
Earth is covered with water. Most of the water is … read more
Something scary happened in Washington, D.C., on January 6. People … read more
Ellis Island opened on January 1, 1892. What is Ellis … read more
This year, we will have the first female vice president … read more
©2017 McGraw-Hill Education. All Rights Reserved.