Chris and Gabe Santos explain how you can learn about the Earth’s history by learning how to read the rock layers.
Lesson 11
Science
6th Grade, 7th Grade, 8th Grade, 9th - 12th Grade
A wildlife biologist puts an ambitious plan in motion to save two uniquely American reptiles — the eastern indigo snake and the gopher tortoise — and the longleaf pine forest they call home.
Lesson 12
Three species of sea turtles nesting in southeast Florida face a range of manmade threats.
