To celebrate the much-hyped National Park Service centennial, my editor at National Geographic Adventure came up with a novel idea: What if we did a series of profiles of 20-somethings doing cool work in national parks? Yes and yes, I said. With my co-writer, Chris Kassar, we put together a series of 20 profiles. I got to interview an incredibly interesting range of people with bright ideas: a musician who organized a classical ensemble to perform works inspired by national parks in national parks; a conservation biologist who bushwhacks through the Hawaiian rainforest in search of rare microscopic moths; and an artist who transforms scientific graphs illustrating climate change into gorgeous watercolors. I have ten profiles in all in this package. Check out the whole series, 20 Under 30: The Next Generation of National Park Leaders on the website. Happy birthday, National Park Service!