Human Immunodeficiency Virus 3D
Credit: Ivan Konstantinov, Yury Stefanov, Aleksander Kovalevsky, Yegor Voronin, Visual Science Company
At first glance, it could pass for a piece of crochet, a fluffy gray and orange ball. But its real-world counterpart is far more destructive: It claims an estimated 2 million lives a year and has wreaked more global havoc than some wars.