Our second essential source of information is provided by global observations today, especially satellite observations. (sindark.com)
In a first, geologists have compiled a set of global observations of the movement of the Earth's mantle — the 3,000 - kilometer - thick layer of hot silicate rocks between the crust and the core. (thescienceexplorer.com)
Rising temperatures have caused the amount of Arctic sea ice to shrink dramatically since global observations began in the 1970s. (scientificamerican.com)