[揽瓜阁精读] 241.鸟和恐龙的化石

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241鸟和恐龙的化石
some scientists don’t believe birds evolved from ground-dwelling theropod dinosaurs. -T 出现的比bird晚，比如fossils A&nmt.
But, 发现了A（最早的鸟）和早期鸟类的closet relative nmt同期化石. 没发现某种预测方向相关的化石不排除(rule out)它们是存在但还没有被发现的可能
Skeptic（怀疑论者，持怀疑态度的人）: birds’ clavicles differ from t’s, but fossils identical of t&A been found.
Finally: birds lungs cannot be evolved from t. no fossil lungs yet.