Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Medication errors are three times higher among children and infants than with adults.
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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.
Multiple crossovers can include more than two chromatids
The immune system has several different components that work in concert.