I'd be interested to see if there is any reference to support grains being used as human food 100 000 years ago; as far as I can tell the Nature story seems to

I'd be interested to see if there is any reference to support grains being used as human food 100 000 years ago; as far as I can tell the Nature story seems to indicate roughly 30 000 years for the new findings. Cultivation of grains is usually said to date back about 10 000 years before present. The time perspective to see this in is at least a couple of million years of evolution as what we label the genus Homo, and in the ballpark of 65 million years of evolution as primates. Seeds are rich in energy and nutrients to supply the plant embryo inside during the beginning of it's growth, and consequently heavily protected, be it by mechanical or chemical means. If this seems difficult to believe, consider the impact on a plant's reproductive success of getting its seeds destroyed versus receiving damage to some somatic tissues.