What do humans eat before the invention of agriculture, in the ice age?
Well it is a common misconception that the entire world was covered with a sheet of ice during the ice age. In actuality, there were plenty of spots of open areas where fauna and many different kinds of plant life grew. Agriculture is a relatively new development in human evolution, we spent most of our existence as Hunter Gatherers primarily eating plants, roots, seeds, and such. We ate meat when we could get it there is plenty of evidence of Clovis points in faunal assemblages, so we did hunt and eat animals but not like in the 10,000 BC movie. We did not hunt megafauna on a regular basis, we ate alot of small creatures like rabbit and we hunted alot of deer. Fish wasn’t big on our menu, fish have always been unreliable, salmon wont spawn for example, if the temperature of the water is as much as 2 degrees above the mean temperature. Fish were an opportunistic thing, we ate them if they were available but we did not actively fish.