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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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.
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.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
If you could remove all of your skin, it would weigh up to 5 pounds.