How did the saber toothed tiger become extinct?

The extinction of the saber tooth tiger poses many questions and theories. The answer to why it became extinct could be due to changes in the environment or human interaction. Around the same time that this species died out, so did 15 others, which can't be a coincidence.

The last glacial period seems to have been different from others due to the drastic increase in temperature and the transformation of grasslands into forests. This affected the saber tooth tigers since that resulted in a change in ecosystems, for example, the Bison lived in grasslands. With its habitat dwindling, its numbers decreased and so the main source of food of the saber tooth tigers went away.

Some say that perhaps humans played a role in the extinction. At about the same time they became extinct, humans were beginning to hunt better thus maybe they were killing the tigers for sport or protection (but not food).