Scientists have found pristine clouds of the primordial gas that formed just after the Big Bang and it matches the composition made by predictions, which adds to direct evidence in support of the modern cosmological explanation for the origins of elements in the universe. Only the lightest elements, mostly hydrogen and helium, were created in the Big Bang. A few hundred million years passed before clumps of this primordial gas condensed to form the first stars, where heavier elements were forged. 

But astronomers have always detected "metals" (their term for all elements heavier than hydrogen and helium) wherever they have looked in the universe. 

Physicists have succeeded in taking a decisive step towards the development of more powerful computers; they were able to define two little quantum dots (QDs), occupied with electrons, in a semiconductor and to select a single electron from one of them using a sound wave, and then to transport it to the neighboring QD.

A single electron “surfs” thus from one quantum dot to the next like a fish on a wave. This manipulation of a single electron will also enable the combination of considerably more complex quantum bits instead of classical bits (“0” and “1” states).

Loudspeakers have improved a lot in the last 50 years but one pesky issue has remained; dead spots.  
 

Modern oudspeakers can be designed to deliver the full frequency range of audible sound but it is difficult to achieve a smooth frequency output in all directions. Dead spots are caused by deconstructive interference as a result of radiating sound waves overlapping and cancellng each other out. This often happens when the sound is radiating from two or more sources, like in the mid-frequency ranges where both the 'woofer' and 'tweeter' loudspeaker cones are both active. This creates areas where the frequency response of the loudspeaker is less smooth, and sound quality is diminished.