Comments by "Don Fleming" (@DonFleming-v2u) on "Veritasium" channel.

  1. @2:20 What "evolution" can decide such a peculiar capability to only one species? Why not to any other co-habiting animals?
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  2. Thanks but you didn't explain why earlier rails did have the extension gaps? Also I have seen buckled tracks in extremely hot summers and why do they happen?
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