In Explore Fossils! With 25 Great Projects , readers can expand their dinosaur obsessions into learning opportunities that take them beyond Triceratops , Stegosaurus , and even Tyrannosaurus rex to other animals, plants, and microbes that lived long before humans. Explore Fossils! introduces young readers to the history of life on Earth as revealed by fossils. Kids learn how fossils form and about the different types of fossils and the world of long ago?its landscape and the plants and animals that lived then. Scientists use radiometric dating to test fossils to discover when they were made, what organisms made them, what those organisms used for energy, what killed them, and a whole lot of other information. All from rocks! That's a lot of information stored under our feet. Activities include creating plaster fossils, using popcorn to illustrate radiometric dating, and exploring what might have caused mass extinctions by making a lava flow and simulating an asteroid impact. By studying the past, not only do students meet amazing plants and animals, they are also encouraged to consider their own role in geological time to make thoughtful hypotheses about the future.