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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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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 human body produces and destroys 15 million blood cells every second.
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In 1864, the first barbiturate (barbituric acid) was synthesized.