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Evolution

by Stella Kaplowitz
Across
Created first by homo erectus.
Current topic of our science class.
Well-built and strong early human.
First ancestor of horse.
Remains of ancient animal and plant life that has been preserved naturally for millions of years.
Animals lacking a backbone.
Ex. snake
Scientific name for human.
Most scientific theory of Earth's formation
Author of "The Origin of Species"
Supercontinent that began to break apart about 175 million years ago.
Down
Hairy, warm blooded animals.
Current state of dinosaurs
Meat eater
Early nature distantly related to more present nature.
Extinct group of carnivorous mammals.
First ancestors of human to cook food.
Extinct class of arthropods that every force of nature originated from.
Develop gradually, especially from a simple to a more complex form.
Members of the family of humans.