FROM “UNIQUE GROWTH STRATEGY IN THE EARTH’S FIRST TREES REVEALED IN SILICIFIED FOSSIL TRUNKS FROM CHINA,” BY HONG-HE XU, CHRISTOPHER M. BERRY, WILLIAM E. STEIN, YI WANG, PENG TANG AND QIANG FU, IN PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES USA , VOL. 114, NO. 45; NOVEMBER 7, 2017
