That 5500 is a terminus ante quem[1], the time before which - not the time at which - humans must have started consuming milk products. I don't know whether the

That 5500 is a terminus ante quem[1], the time before which - not the time at which - humans must have started consuming milk products. I don't know whether the 6000 year number is based on anything, but changing it to 5500 wouldn't make the title any more correct. You'd have to explicitly mention that it was a bound, which is probably a bit much for a headline. [1] https://en.wikipedia.org/wiki/Terminus_post_quem https://en.wikipedia.org/wiki/Terminus_post_quem