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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

CRISPR-Cas9 System for In Vivo Genome Editing Experiments CRISPR-Cas9 System for In Vivo Genome Editing Experiments
Gene editing using the CRISPR-Cas9 system. Gene editing using the CRISPR-Cas9 system.
Treponema pallidum using a modified Steiner silver stain. Treponema pallidum using a modified Steiner silver stain.
Proteins synthesized, modified and transported via the Golgi apparatus Proteins synthesized, modified and transported via the Golgi apparatus
Generation of various modified dihybrid ratios from the nine unique genotypes Generation of various modified dihybrid ratios from the nine unique genotypes
A model for C-to-U RNA editing A model for C-to-U RNA editing
Video: Simple Diffusion - Ion transport

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