
Some animals take long naps. Hibernation is when animals sleep for a long time during winter. Groundhogs hibernate. They dig deep burrows under the ground. They stay safe and warm in their burrows.
Photo Credit: Brian E Kushner/Shutterstock
We all live on Earth. On Earth Day, we learn … read more
October 4 is World Animal Day. All of us can … read more
November 1st is National Author’s Day. Let’s celebrate people that … read more
© 2026 McGraw-Hill Education. All Rights Reserved.