Unformatted text preview: factors may have affected the plant eaters directly by disrupting mating and migration, or indirectly by reducing the quantity and quality of plants on which they fed. The second theory involves kill sites that show that early man in North America had developed extensive weapons. This advanced culture allowed humans to become more effective in hunting these big plant eaters. Man’s hunting or other activities may also have been a factor in extinction. I feel that the true reason is a combination of both. I feel that both weapons and climate change resulted in the extinction. I don’t think that one factor could result in the extinction, and more must have caused it....
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- Spring '06
- Pleistocene, La Brea Tar Pits, Rancho La Brea, Smilodon