In a flash, over 500 million years ago, fantastic creatures suddenly appeared in the fossil record. Learn more about the Cambrian explosion!
Reviews microevolution and macroevolution.
Learn new vocabulary words and help remember them by coming up with your own sentences with the new words using a Stop and Jot table.
Find out about plants alive today that tell us about the plants that first moved to land.
Find out about the longest running lab experiment in natural selection.