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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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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Measures of ocean chlorophyll-a concentrations from part of Atlantic Canada in (a) January 2006, and Measures of ocean chlorophyll-a concentrations from part of Atlantic Canada in (a) January 2006, and
A closer look at glycolysis PART A A closer look at glycolysis PART A
Pupil assessment; A, starting position, with penlight to side of pupil; Pupil assessment; A, starting position, with penlight to side of pupil;
Small nuclear RNAs (snRNA), 100-200 bp in length, form part of the splicing mechanisms to process mR Small nuclear RNAs (snRNA), 100-200 bp in length, form part of the splicing mechanisms to process mR
Assessment of characteristic odors Assessment of characteristic odors
Hydrolysis reactions for some biochemically important phosphate compounds (part 1) Hydrolysis reactions for some biochemically important phosphate compounds (part 1)
Video: Helper T cell receptors, activation, proliferation, differentiation & action

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