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Blood is approximately twice as thick as water because of the cells and other components found in it.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
Excessive alcohol use costs the country approximately $235 billion every year.
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.