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Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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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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Illicit drug use costs the United States approximately $181 billion every year.

Evolution of the gibberellin-DELLA system. Evolution of the gibberellin-DELLA system.
The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown. The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown.
The Digestive System "الجهاز الهضمي" The Digestive System "الجهاز الهضمي"
Anatomy of Autonomic Motor Pathways Anatomy of Autonomic Motor Pathways
Main components of the human endocrine system and the effects of their secretions Main components of the human endocrine system and the effects of their secretions
Organ System Interactions Organ System Interactions
Video: Heart Chambers

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