Monarch butterflies are special. They are the only type of butterfly that migrates like birds. Migration is when animals and insects, such as birds and monarch butterflies, travel from one place to another in order to survive. Monarch butterflies cannot survive the cold winter. Instead, … Read more
Wanda Díaz-Merced always wanted to be a scientist. While growing up in Puerto Rico, she took pretend trips to faraway galaxies. As she got older, she began to really study the universe. She became an astronomer. But in her 20s, Díaz-Merced lost the ability to see. Astronomers depend … Read more
Today, there are buildings all over the world that stretch up into the sky, a hundred stories or taller. The tallest building in the world, the Burj Khalifa, is more than 160 stories! But skyscrapers … Read more
On September 11, 2001, the United States suffered its worst terrorist attack. Members of a terrorist group called al-Qaeda hijacked three airplanes. They crashed the planes into the Pentagon outside of Washington, D.C., and the … Read more
If you’ve been learning remotely for over a year, going back to school might feel different. You might need to wear a mask to school. If you aren’t used to wearing a mask all the … Read more
© 2025 McGraw-Hill Education. All Rights Reserved.
