
Shoelaces have been around for a long time. Laces were made of rawhide in ancient times. Rawhide laces held pieces of leather together. This formed a sandal to protect bare feet.
Photo Credit: Lee Rogers/E+/Getty Images
Dolphins live in groups called pods. Living in a pod … read more
Plastic is bad for the Earth. Find ways to use … read more
Jackie Robinson played baseball. Before Robinson, baseball was divided. African … read more
© 2026 McGraw-Hill Education. All Rights Reserved.