Pulse oximeters are known to be biased against darker skin tones. Kimani Toussaint is a physicist at Brown University working on an alternative to the pulse oximeter.
Joshua Burrow/Kimani Toussaint
A pulse oximeter is worn by Brown University professor Kimani Toussaint. The devices have been shown in research to produce inaccurate results in dark-skinned people, and Toussaint's lab is developing technology that would be more accurate, regardless of skin tone.
Siblings Sangeeta (from left), Sunil and Ravi Tripathi. Sunil went missing weeks before the Boston Marathon, and media outlets misidentified him as one of the bombing suspects.
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