so I put it down on the desk , '' Heidi Stoll told CNN . ` A Michigan boy in a creek finds what looks like a really big , really old tooth . The tooth is six inches in length , brown , and has two peaks . An archaeologist determines it 's a tooth from a long - extinct animal . Mastodons were elephant - like animals that roamed North America 10,000 years ago .
A Michigan boy in a creek finds what looks like a really big , really old tooth . The tooth is six inches in length , brown , and has two peaks . An archaeologist determines it 's a tooth from a long - extinct animal . Mastodons were elephant - like animals that roamed North America 10,000 years ago .