But when we were stopped at a red light, that was the moment when I saw the homeless, hungry man who changed my life forever.

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All was well in this peaceable kingdom until October, 2003, when Treadwell and his girlfriend, Amie Huguenard, were attacked and devoured by a hungry long-nosed grizzly.

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The men were hungry, but their boss in the white helmet was a bit skeptical when I told him a guy working at a hot dog cart some 10 blocks away claimed to have 50 hot dogs he could sell them.

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Even when given the option to eat when hungry or to stimulate the pleasure center, the rats chose the stimulation until they were physically exhausted and on the brink of death.

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