⏰ when
When did mammals first evolve hair?
Quick Answer
Mammal hair likely evolved by the Late Triassic, more than 200 million years ago.
The Full Story
Hair is one of the defining features of mammals, but its exact origin is not preserved directly in fossils. Scientists infer that hair evolved by the Late Triassic, more than 200 million years ago, because early mammals and their close relatives show other mammalian adaptations. Hair likely helped with insulation, tactile sensing, and possibly parenting behaviors. It was probably already present before true mammals became widespread.
Key Facts
1.Hair likely evolved more than 200 million years ago
2.Late Triassic estimate
3.Hair helped with insulation and sensing
YouTube Angle
Suggested video title for this topic:
"How mammals may have first grown fur"
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