The country may be on the cusp of a few extraordinary advances.
Paleontologists have often determined how old a dinosaur was by counting the growth rings in its bones. Just like with trees, it was thought that each ring corresponded to a single year of age. But researchers who studied crocodiles at an outdoor recreation center near Cape Town appear to have poked a hole in that approach. In the crocodiles, which are some of the closest living relatives of dinosaurs, there was more than one growth ring laid down per year. The results contribute to a growing debate over the best way to age animals.
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Read more of reporter Ari Daniel's story "Searching for Dinosaur Secrets in Crocodile Bones."
This episode was produced by Hannah Chinn. It was edited by Rebecca Ramirez and Brent Baughman. Hannah Chinn checked the facts. The audio engineer was Robert Rodriguez.
