Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Randi Minetor has written nine books about people dying in national parks. Needless to say, she has a lot of thoughts about it. “A lot of people go to national parks to challenge themselves, to try things they have never tried before,” she tells Popular Science . “They’ll take a course in canyoneering or hire a guide to go up a mountain; they’ll push themselves in ways they haven’t before. Not everyone can do those things,” she warns. “Just because you want to do it doesn’t mean you can. ” It’s excellent advice that doesn’t always get followed . Yet the number of people who die in national parks each year is smaller than you might expect. Across all national parks, the National Park Service reports an average of 358 deaths per year .  “The parks work very, very hard to prevent people from getting killed,” she says, with robust search and rescue teams.…