Immunotherapy is one of the most promising new ways to fight cancer, but it takes forever. It works by mimicking or invoking the body's own immune defenses to weed out and attack cancer cells. But the drugs that do this are typically administered intravenously'fed into the blood using needles, in a long and invasive process. Patients spend hours in a hospital as the infusions are drip-fed into their veins. It would be much simpler and less painful if the drugs could be injected under the skin from the comfort of a patient's home. But that would require much higher concentrations of the drugs, resulting in a thick formula too viscous to inject. There is an answer: If you crystallize the proteins in the drug instead, you can get a high concentration into a smaller volume, and a solution of these tiny crystals comes without all the viscosity. The only problem is it's almost impossible to do this on Earth. If you try, the resulting crystals are full of imperfections and come in a random...
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