Easier Flashlight Mod Increases Run Time 3.6X
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Fascinating! How a Canadian history buff (may have) solved a Second World War ‘pigeon-code mystery. (Thanks to Karl H. for the link.)
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How to Make Batteries From Spare Change
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Gregg P. sent: Search of DNA Sequences Reveals Full Identities. In First World nations, law enforcement agencies are busily building huge libraries of blood and tissue samples (cheek swabs.) If eugenics ever regains popularity, or if “genetic profiling” for a family criminal tendency or psychological abnormality ever emerges, then this is very frightening news.