Communicating Across Time

        I just finished reading Timescape by Gregory Benford and Walden by Henry David Thoreau and the two books strike me as a perfect set for a meditation on time travel.  I doubt Henry David Thoreau ever thought about time travel, but any writer that produces a classic book is communicating across time, sending messages [...]

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Scientific American Questions Ethanol

Last summer brought many stories about the success of ethanol in Brazil during the times gasoline prices were peaking in the U.S. My hopes for the future were boosted by those reports, but the January, 2007 issue of Scientific American has brought me back down to reality. Matthew L. Wald reports in “Is [...]

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