some truth

Hair and fingernails do not continue to grow after a person dies. Rather, the skin dries and shrinks away from the bases of hairs and nails, giving the appearance of growth.

Snapping or cracking one’s knuckles does not cause arthritis.

Sugar does not cause hyperactivity in children.

It is a common misconception that sleepwalkers should not be awakened. While it is true that a person may be confused or disoriented for a short time after awakening, it is actually quite dangerous to not wake a sleepwalker as they may injure themselves if they trip over objects or lose their balance while sleepwalking. Such injuries are common among sleepwalkers.

Mussels that do not open when cooked can still be fully cooked and safe to eat.

Mammal blood is bright red or scarlet when oxygenated and a darker red when not oxygenated. It is never blue.veins appear blue through the skin because of differential absorption of wavelengths of the blood’s color by the overlying skin and flesh.  

The Coriolis effect. does not determine the direction that water rotates in a bathtub drain or a flushing toilet. The Coriolis force is relatively small; it appears over large scales (like weather systems) or in systems such as the faucoult pendulum in which the small influence is allowed to accumulate over time. In a bathtub or toilet, the flow of the water over the basin itself produces forces that dwarf the Coriolis force. In addition, most toilets inject water into the bowl at an angle, causing a spin too fast to be affected by the Coriolis effect.

Charles Darwin did not convert to Christianity on his deathbed.

thomas edison did not invent the light bulb.

The black box, used for aviation accident investigation, is actually painted bright orange as to aid in recovering it from the crash site.

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