It is generally believed that the sword mastodon migrated to South America from North America  The sword mastodon is characterized by sharp sword-shaped incisors, short jaws, protuberant crowns of molars, 7 to 8 dental plates, and milky protuberances, hence the name  The tooth structure of the sword mastodon is more complex, which indicates that it can eat grass  There is evidence in many parts of South America that prehistoric humans captured sword mastodon
The sword mastodon lacks the ability to protect itself from a human attack
 It can be inferred that the extinction of sword mastodon may be closely related to the overhunting of human beings