Michaela Cosgrove

• N/A, United States
• Female
• Undergraduate Student
• Member Since: December 1, 2016

Dinosaurs
Dinosaurs where first discovered during the Triassic period. There were several different species of dinosaurs. Dinosaurs went extinct about 65.5 million years ago. No one knows a correct answer on why they could have died but they do have some idea.
Subject: Science | Grade: K-2
Author(s): Michaela Cosgrove
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