Magnets are fascinating. Their ability to attract, repel, and power everything from fridge decorations to electric motors sparks endless curiosity among enthusiasts and DIYers alike. One question that
霍納與古德溫針對不同生長階段的厚頭龍顱頂和頭飾的分析比較圖。最上方的 (A),(B) 為成年的厚頭龍標本 AMNH 1696；(C),(D) 為另一個較為年輕的厚頭龍個體 UMCP 556078；(E),(F) 則為標本號 MPM 8111 的冥河龍顱頂；最下方的 (G),(H) 則是原先被歸類為龍王龍的 TCNI 2004.17.1 標本。圖／John R. Horner , Mark B. G
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