By studying the isotope composition in the collagen, it was shown that the Neanderthals' diet consisted primarily of large plant eaters such at mammoths and rhinoceroses, however the result also concluded that around 20% of their diet was plant matter.
Later hunter-gatherers lived in nomadic tribes that hunted animals like bison, mammoth, wild boar, horse and red and roe deer, grey seals.
Some so-called creation scientists have attempted to show that radiometric dating does not work on theoretical grounds (for example, Arndts and Overn 1981; Gill 1996) but such attempts invariably have fatal flaws (see Dalrymple 1984; York and Dalrymple 2000).
Wild animal species (such as wild boar and horse) were leaner compared to their modern-day domesticated equivalents, so much of the fat the Stone Age people ate came from marine mammals, fatty fish and nuts.
Snails where consumed at least 150,000 years ago, with evidence from the Haua Fteah cave (Libya) that indicates early humans used stone ‘drills’ or thorns to extract the molluscs from their shells.
Young-Earth creationists -- that is, creationists who believe that Earth is no more than 10,000 years old -- are fond of attacking radiometric dating methods as being full of inaccuracies and riddled with sources of error.
When I first became interested in the creation-evolution debate, in late 1994, I looked around for sources that clearly and simply explained what radiometric dating is and why young-Earth creationists are driven to discredit it.