Corrections

February 2021, page 23—The article erroneously reported a $1.8 million grant in 2020 to Ucore Rare Metals Inc from the US Army Research Laboratory. In fact, grants totaling $1.8 million were awarded in 2014–16 to Innovation Metals Corp to help fund development of its proprietary rare-earth separation technology. IMC was acquired by Ucore in 2020.

February 2021, page 27—The device in the photo is incorrectly identified as “the inside of an acoustic cytometer.” It is actually a close-up image of a DNA fragment-sizing flow cytometer.