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Questions tagged [scales]

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62 votes
4 answers
18k views

How come large herbivores have such thin legs?

Edit: This question is very similar to this and related to this one (though the latter focuses on homology instead of scaling laws). However, the answer to this question is far more comprehensive, in ...
Kevin Kostlan's user avatar
1 vote
1 answer
350 views

Which Geologic time scale is the most accurate? [closed]

I kindly ask to show me some pictures that is a generally accurate geologic time scale. In google, a lot of geo time scales are different. On what i have searched there are 2 major eons which are ...
Via Lo's user avatar
  • 169
5 votes
2 answers
8k views

Are fish and reptilian scales homologous?

Wikipedia: Fish scales are dermally derived, specifically in the mesoderm. This fact distinguishes them from reptile scales paleontologically. So aren't reptilia scales also dermally derived?
Anixx's user avatar
  • 3,006
7 votes
1 answer
2k views

What did pangolin scales evolve from?

Were they developed anew or a heritage from fish?
Anixx's user avatar
  • 3,006
18 votes
2 answers
2k views

Do the majority of fish lack scales on their heads?

Based on pictures, it seems to me that a vast majority of fish species that have scales do NOT have scales on their heads. Is that fact true? To make this properly answerable: lets' define a "...
DVK's user avatar
  • 2,075
9 votes
2 answers
2k views

Did human hairs actually evolve from scales?

What is the evolution of hairs? Did they evolve from scales?
Anixx's user avatar
  • 3,006