New study adds fascinating new creatures to the Mesozoic Menagerie. These mammals did not lurk in the shadows of dinosaurs. Instead, they glided far overhead, avoiding predatory dinosaurs on the ground — essentially flying squirrels of the Jurassic Period, from an extinct branch of mammals.

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New study adds fascinating new creatures to the Mesozoic Menagerie. These mammals did not lurk in the shadows of dinosaurs. Instead, they glided far overhead, avoiding predatory dinosaurs on the ground — essentially flying squirrels of the Jurassic Period, from an extinct branch of mammals.