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

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

A nearly motionless individual, alert to danger, will whistle when alarmed to warn other groundhogs A nearly motionless individual, alert to danger, will whistle when alarmed to warn other groundhogs
Firing Rate of Individual SCN Neurons in a Tissue Culture Color bars have been added to emphasize th Firing Rate of Individual SCN Neurons in a Tissue Culture Color bars have been added to emphasize th
Infants can segment adult speech into individual words.  Infants can segment adult speech into individual words. 
Finding the derivative using the power rule - Solutions Finding the derivative using the power rule - Solutions
Finding derivatives of Trig Functions - pt 4 Finding derivatives of Trig Functions - pt 4
finding the resultant force finding the resultant force
Video: Origin of organelles Animation

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