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Blades Ingenuity’s 2-foot-long blades are specially designed for the Martian atmosphere, which is 1 percent the density of Earth’s. “As the blades rotate, they tend to flap up and down a little bit, which interferes with control,” Balaram tells Popular Mechanics. “On Earth, [this motion] gets stamped out. On Mars, in the thin air, it doesn t get stamped out.” Grip, a research technologist also at NASA’s Jet Propulsion Laboratory, likens the unsteady motion to riding a bicycle with heavy grocery bags hanging from the handle bars. To counteract the wobble and make the flight smoother, the blades, which have a foam core and a carbon fiber coating, are crafted to be lightweight but extremely stiff. ....
Plants have never been so in vogue. Nearly 10 million Americans are now following a plant-based diet, according to a recent survey, and that number continues to grow. Meanwhile, it’s no surprise that Americans are also eating less meat one in four report eating less meat than they had previously, says a Gallup poll. But with the holidays upon us, who can say no to juicy turkey, succulent ham, and that enticing Christmas morning brunch (looking at you, egg-and-bacon casserole)? It turns out, it’s not that hard when you make the right swaps. “I recommend focusing on traditional flavors that you already love and building a meal around the center of the plate,” says chef Matthew Kenney, founder of PlantMade foods. Read on for the best chef-approved plant-based swaps for your favorite holiday dishes. ....