IT is to be feared that the former of these books (which are bound together) must be condemned if only for the astounding way in which optical images are considered. The image in a concave mirror is ...

Figure 1: Concentrations in the bulk silicate Earth of moderately volatile elements. Volatile-loss experiments were performed at 1,300 °C and a range of values from −7 to −13. This range represents ...

Initially dedicated at the Lawrence Berkeley National Laboratory in Berkeley, California, on March 11, 2000. Rededicated at Lawrence Hall of Science in Berkeley on August 11, 2019, during the ...

The heaviest element that humans have ever found is called oganesson. Each atom of the stuff packs a whopping 118 protons into its dense center. In contrast, hydrogen—the most abundant element in the ...