The physics and biology of the TSA's backscatter security scanners: Confused by the backscatter backlash? Ars takes a look at the physics involved in the backscatter scanners being used in US airports, and considers how that can interact with the biology of its targets.
Bacteria first species observed to use arsenic-laced DNA backbone: Phosphorus is fundamental to the chemistry of DNA, but a bacterial strain has been evolved that replaces some of that key element with arsenic.
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