If 恐竜 were cold-blooded, like today's reptiles, they would have been slow または inactive in cold conditions.
If 恐竜 were warm-blooded, like birds and mammals today, they would have benn able to stay warm and active in cold conditions.
Experts once believed that all 恐竜 were cold-blooded, but today there is much disagreement.
Some evidence for warm-bloodedness comes from the structure of fossil bones.
The structure of some dinosaur BONES（ボーンズ）-骨は語る- is もっと見る like that of warm-blooded creatures than that of reptiles.
Some small meat eaters may have evolved into birds. As birds are warm-blooded, these 恐竜 may have been, too.
If 恐竜 were warm-blooded, like birds and mammals today, they would have benn able to stay warm and active in cold conditions.
Experts once believed that all 恐竜 were cold-blooded, but today there is much disagreement.
Some evidence for warm-bloodedness comes from the structure of fossil bones.
The structure of some dinosaur BONES（ボーンズ）-骨は語る- is もっと見る like that of warm-blooded creatures than that of reptiles.
Some small meat eaters may have evolved into birds. As birds are warm-blooded, these 恐竜 may have been, too.
