[medved]

radiocarbon dating absolutely assumes that the ratios of the various kinds of carbon in the air have always been what they are now. Even one global ccatastrophe such as the deluge at the time of Noah, and there have been several such within the last ten thousand years, and all such assumptions go straight out the window.

[RightWhale]

the ratios of the various kinds of carbon in the air have always been what they are now

It's based on the rates of creation and decay of the proportion of C14 in the atmosphere, which would be independent of earthly conditions that affect carbon concentration in the atmosphere. So goes the theory anyway.

[ValerieUSA]

Carbon dating is primitive and is not the definitive last word.
I think the cave horses are stunningly beautiful. If neanderthals were aware of beauty, it is not surpising that they outbred their unattractive traits through the years.