(via) I’m heading back to California’s Gold Country soon to check out a very special grove of sequoia trees in Yosemite National Park (among other things). I’ve been up close and personal with these massive living things (the biggest trees in the world) before in nearby Sequoia National Park, but I’ve never really understood how they get so big or wondered what stops them from getting any bigger. Seeking answers, I found this fascinating explainer by TED-Ed’s Valentin Hammoudi. It turns out it’s all about the sap…