Mighty molar R.C. Cadwalder holds a prehistoric creature's tooth, possibly a mastodon's molar, he found while fishing for catfish on the Trinity River near Tarkington, Texas. The tooth is 71/2 inches tall, weighs nearly 4 pounds and contains two rows of three cusps or peaks. Cadwalder, a rancher and farmer, also found three other bones that appear to be from the same animal. University of Texas paleontologists have been contacted to inspect the site.