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  1. 19400

    Using laser technology that has an apparent resolution of only about half a centimeter is somewhat laughable. I also wondered whether the “fresh coat of desert varnish” was an April fool joke. Actually, I really look forward to every new issue. You do a great job. Fred DombroseCharlotte, N.C. For images that weren’t three-dimensional, the […]

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  2. Archaeology

    Laser scanners map rock art

    Researchers have developed a way to use laser-based surveying equipment to quickly and easily create detailed images of ancient rock art.

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  3. 19399

    Again, humans are implicated in the promotion and distribution of our own misery. However, if bitumen was wrongly credited with darkening the skin of mummified remains, what caused it? Robert FizekNewton, Mass.