Latest Second Stories
PARIS (AFP) -- Japanese scientists say they have made a technical breakthrough in the quest to perfect the world's most accurate clock, a timepiece that would lose only one-quintillionth (a million-million-millionth) of a second per day. University of Tokyo researcher Hidetoshi Katori and colleagues devised a "pendulum" of strontium atoms that ride on the crest of highly stable laser-generated lightwaves, according to their study, which appears on Thursday in Nature, the weekly...
Latest Second Reference Libraries
Cesium (or Caesium) is a chemical element with the symbol Cs and atomic number 55. Caesium is a soft alkali metal that is silvery-gold. It melts and liquefies at 83 degrees Fahrenheit and is one of only five metals that are liquid close to room temperature. Caesium is a metal that is most widely known for its use in atomic clocks. Cesium comes from the Latin word caesius meaning "˜bluish-gray'. It was discovered in 1860 by Robert Bunsen and Gustav Kirchhoff in Durkheim, Germany in mineral...
