Extinct in the wild for more than 35 years, scimitar-horned oryx are back in their native habitat thanks to international collaboration and the power of science. #EarthOptimism #WeSaveSpecies On Earth Day weekend, the Smithsonian is convening the Smithsonian Earth Optimism Summit, an event about the science that's working to solve complex conservation challenges around the globe. https://earthoptimism.si.edu/