Beaver teeth are tough and resistant to tooth decay thanks to iron-laced enamel, new research suggests. This beaver specimen is from Jackson Bottom Wetlands Preserve in Hillsboro. (Tom Brandt ...

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Beavers are almost immune to tooth decay; that's because they've got tiny iron-rich nanowires interwoven throughout the enamel core of those outsized incisors.

The mountain beavers don’t need those teeth now, but they did about 10 to 15 million years ago, which is when these teeth features first appear in the fossil record.

John Zancanella, coordinator of the U.S. Bureau of Land Management's paleontology program in Prineville, discovered the ancient teeth on an eroded, rolling stretch of BLM land.

As It Happens7:10Not only are Komodo dragon teeth razor sharp; they're also iron coated Not only do Komodo dragons have serrated, razor-sharp teeth that constantly replenish themselves — they're ...

The beaver’s long buck teeth help it chew on tree trunks and branches to gather wood for building its home, called a lodge, a dry living area which it accesses through underwater entrances and ramps.