Thanks To Our Ancestors
There is a chance that glyptodons were herbivores even though they came equipped with big claws and a big armor. At that size, they must have had to fend off apex predators. The population of these animals must have taken a hit due to the ice age, but humans also caused them to go extinct due to hunting. In fact, the animals in question had been the first animals to go extinct at the hands of our ancestors! Why did they hunt them in the first place?
They Had A Special Shell
There were several reasons the glyptodons were hunted. First of all, the huge and hard shells must have been attractive to our forebears. They were the perfect thing to use as a makeshift shelter. You might think that humans lived in caves back then, but there were not many of those available. On the other hand, a shell like this could fit two to three people. This was not the only reason they were hunted.