
The black hole is very big. It has as much matter as four million Suns! It is also very far away. Dr. Ghez used these telescopes to find it.
Photo Credit: Abbie Warnock-Matthews/Shutterstock
This is a walrus. It lives near the North Pole. … read more
Kansas has many plains. Plains are big areas of flat … read more
Some bats live in caves. They sleep upside-down. These bats … read more
© 2026 McGraw-Hill Education. All Rights Reserved.