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By bathing a column of strontium atoms in the super-intense light of a laser, the researchers created a clock so accurate it wouldn’t gain or lose a second over the entire age of the universe. But today’s new clock, also from JILA, takes that to the next level — or, rather, dimension.Instead of a single column of atoms, the team demonstrated how to use a three-dimensional cube of strontium atoms to generate the clock’s super accurate ticks.

Scientists now have accurate methods (see below ) for dating fossils.erectus (including the Java and Peking hominids - the archetypal Missing Link) and H.sapiens (including Neanderthals and Cro-Magnon) (see the modern taxonomic classification of humans).is heritable) and arises through processes such as mutation and recombination.[2] Natural selection, gene flow and random genetic drift (the random change in gene combinations with each generation) drive evolution, resulting in a change in gene frequencies within populations .

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