Author: Ian Taylor The Source of C-14 The earth’s atmosphere is bombarded with cosmic rays thought to originate from our sun. The earth’s magnetic field serves to protect us from most of these cosmic rays. When the nucleus of a nitrogen atom (...

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Author: Mark Cadwallader You can tell the film is being run backward because such behavior is never observed in real life. We do not see exploded and broken pieces produce cars as they fly up a cliff because it is forbidden by the Second Law of Thermodyn...

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  • The Never-Fail Bat Alarm
    The swiftly moving bat cuts almost invisibly through the darkness, silent to all but those who can hear its ultrasonic radar. What chance does a poor night-flying cricket—prized as a tasty bat snack—have? Let’s treat this problem as if you were the Creator, faced with the problem of giving your night-flying cricket a chance against […]

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