Earth & Environment

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credit card machine

TOXIC TOUCH  By handling receipts, cashiers may be exposed to worrisome levels of BPA and its ilk, which can seep into the body through the skin.

computer simulation of Earth's magnetic field

FLIP FLOP  In a computer simulation, magnetic field lines (top row) twist and curl around the Earth’s liquid outer core. This magnetism results from swirling, or convecting, liquid iron (bottom row). The simulation mimics the process of a polarity reversal in which Earth’s north and south magnetic poles swap. Such reversals, a sign of a strong magnetic field generator, are seen going back hundreds of millions of years in planetary history.

computer simulated tornado

CYBER STORM  The 60-kilometer-wide swirling thunderstorm in this simulation spawned the first digitally created long-lived EF5 tornado (bottom, right-center). The 700-meter-wide virtual twister may reveal why some real-life tornadoes linger.

Earth & Environment

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