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Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Synthesis and assembly of collagen Synthesis and assembly of collagen
Ribosomal subunit assembly Ribosomal subunit assembly
A typical electric cooling fan assembly after being removed from the vehicle. A typical electric cooling fan assembly after being removed from the vehicle.
Spline cam phaser assembly. Spline cam phaser assembly.
Cross section of a typical port fuel-injection nozzle assembly. These injectors are serviced as an ... Cross section of a typical port fuel-injection nozzle assembly. These injectors are serviced as an ...
A manufacturer of cat towers wishes to locate a super assembly facility to meet their cat tower ... A manufacturer of cat towers wishes to locate a super assembly facility to meet their cat tower ...
Video: Hormones and the menstrual cycle Animation

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