DISCOVERY2017_20_F_JONIKAS_pyrenoid Published November 22, 2017 at 1268 × 1600 in Going green: What we can learn from a little alga Next → A cryo-electron micrograph of the pyrenoid, which concentrates carbon dioxide from the air to make photosynthesis run faster. IMAGE COURTESY OF URSULA GOODENOUGH, UNIVERSITY OF WASHINGTON IN ST. LOUIS