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→‎Lack of mechanism: clarify one aspect of the challenge posed
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#  Several species of fish in the Arctic ocean have chemicals in their blood that essentially act as anti-freeze.  Evolution requires gradual change, leaving no plausible explanation as to how the fish survived before developing this trait.
 
#  Several species of fish in the Arctic ocean have chemicals in their blood that essentially act as anti-freeze.  Evolution requires gradual change, leaving no plausible explanation as to how the fish survived before developing this trait.
 
# The blood of tunicates such as the sea squirt is based on the rare element [[vanadium]] instead of the abundant [[iron]] used in other vertebrates, which would have required a complete re-tooling of its entire circulatory biochemistry <ref>http://www.earthlife.net/inverts/ascidiacea.html</ref>.
 
# The blood of tunicates such as the sea squirt is based on the rare element [[vanadium]] instead of the abundant [[iron]] used in other vertebrates, which would have required a complete re-tooling of its entire circulatory biochemistry <ref>http://www.earthlife.net/inverts/ascidiacea.html</ref>.
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# Animals exist in isolated places without any plausible motivation or means for getting there, such as on remote islands or more than 1200 feet high on top of the vertical cliffs of [[Devils Tower]].
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# Animals exist in isolated places without any plausible motivation or means for getting there, such as on remote islands or more than 1200 feet high on top of the vertical cliffs of [[Devils Tower]].  Even humans (though large and intelligent) were unable to ascend the peak until 1893, and required specialized climbing equipment.
    
===Maladaptation===
 
===Maladaptation===
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