Gingko biloba trees guard a secret fountain of youth | ECO EVOLUTION TODAY |
Researchers wanted to know what gives these trees their longevity. They compared dozens of ginkgo trees ranging in age from 15 to 667 years old to see what helped them live so long. Their findings were published in the Proceedings of the National Academies of Science.

"In humans, as we age, our immune system begins to start to not be so good," study coauthor Richard Dixon, a biologist at the University of North Texas, told The New York Times. But in a way, "the immune system in these trees, even though they're 1,000 years old, looks like that of a 20-year-old."