Answer the question you selected for profile question 3 here (300 words):
Most of the megafauna that existed during the past ice ages has gone extinct. There are no more giant Elk, huge ground sloths, Mammoths and such. I have discovered that since the last ice age, when these animals still lived, the quality of plant material as food has gone down tremendously (even though the quantity increased). This, combined with human hunting, could have led to the extinction of these species.