スミソニアン博物館のインスタグラム(smithsonian) - 6月7日 20時27分

🔍 Can you guess the species?
🦴This animal preyed on large herbivores like bison—and maybe even on humans.
🦴Its name comes from the Greek words for “blade” and “tooth.”
Fossil animals often aren't found in their complete form. Practice being a fossil detective as we reveal species from @smithsoniannmnh's new #DeepTime hall, opening June 8.

[BIHAKUEN]UVシールド(UVShield)

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