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229 Million Years Ago
First True Dinosaur: Eoraptor lunensis.
First True Dinosaurs
± 1.5 million years
The first true dinosaurs were predatory omnivores. These three toed birdlike animals gave rise to all dinosaurs and birds including the large carnivores and herbivores. Our line, the mammals, were still highly mammal-like synapsids called cynodonts. Live births would wait another 40 million years from now.
Evolution
Story 
“Natural selection acts solely by the preservation and accumulation of small inherited modifications, each profitable to the preserved being.”
Evolution
Survival belongs to organisms that respond effectively to change as environments shift over time.
Evolution
Quote 
When were toothpicks invented?
Stone Age History
Fossil evidence shows that Homo habilis, living over 2 million years ago, used small sticks or similar objects to clean their teeth, leaving characteristic grooves.
Evolution
FAQ 
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