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Math & Technology

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A deaf guinea pig's hearing improves when electrical signals from its cochlear implant (shown, left) are coupled with gene therapy to stimulate nerve cell regeneration in the inner ear.

ENTANGLED  Tiny electrical circuits have given physicists unprecedented control over the quantum states of units of information called qubits. The qubits appear as five crosses (center).

Of 61 physicians, hospital staff and medical students asked, "If a test to detect a disease whose prevalence is 1 out of 1,000 has a false positive rate of 5 percent, what is the chance that a person found to have a positive result actually has the disease?" only 14 gave the correct answer — 2 percent.

  • Numbers

    
    Context

    Doctors flunk quiz on screening-test math

    Many doctors, and the news media, don’t understand that because of the statistics of screening tests, a test with 90 percent accuracy can give a wrong diagnosis more than 90 percent of the time.

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  • Computing

  • Technology

    50 Years Ago

    Animated movies made by computer

    A 17-minute animated movie made with a computer in 1964 took 2,000 hours of film processing and cost $600 per minute. The 2013 animated film Frozen cost about $1.5 million per minute to make.
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