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Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

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Ethics in social research are of vital concern to sociologists. As discussed in the text, ... Ethics in social research are of vital concern to sociologists. As discussed in the text, ...
This billboard in India caught my attention. As the text indicates, even though India is ... This billboard in India caught my attention. As the text indicates, even though India is ...
Bacterial immunity. Bacterial enzymes destroying nonself DNA which entered in an attack by a ... Bacterial immunity. Bacterial enzymes destroying nonself DNA which entered in an attack by a ...
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Micrograph and graphic of a motor neuron Micrograph and graphic of a motor neuron
Video: Types of Burns

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