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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
![the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M](https://biology-forums.com/gallery/47/medium_12359_13_01_13_5_28_45.jpeg)
![Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a](https://biology-forums.com/gallery/47/medium_275510_22_02_15_5_56_55_20768103.jpeg)