Early in the growth season there is more demand for water so the cells tend to ... Tree-ring width is seldom uniform. It is affected by a range of environmental ...
U-Th dating of corals has extended the 14C calibration curve back to 50,000 ... rings during the spring-summer (light color) and fall-winter dark color) ...
Hill of Infinity shows distances to stars and galaxies. Stone circle works as a simple calendar ... Galaxies and quasars. spirals and ellipticals. clusters ...
Dendrochronolgy: The science that deals with the dating and study of ... Latewood: Dense and often dark wood produced in the annual ring during the later ...