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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Platycnemididae are a family of damselfly called white-legged damselflies. Platycnemididae are a family of damselfly called white-legged damselflies.
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it. In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
The Cori cycle The Cori cycle
Glycolysis and the citric acid cycle Glycolysis and the citric acid cycle
The normal cell cycle and each of its growth phases The normal cell cycle and each of its growth phases
Video: Simple Diffusion - gases and nonpolar compounds transport

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