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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Telomere sequences at the end of a human chromosome Telomere sequences at the end of a human chromosome
Parrot Human (Solution) Parrot Human (Solution)
Abundant cave art after about 30,000 years ago is evidence of the importance of symbolic behavior fo Abundant cave art after about 30,000 years ago is evidence of the importance of symbolic behavior fo
Temperature Ranges for Human Survival Temperature Ranges for Human Survival
Video: Fermentation pathways

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