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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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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Hiatal hernia. (a) The hernia occurs when the stomach protrudes through the diaphragm and into the t Hiatal hernia. (a) The hernia occurs when the stomach protrudes through the diaphragm and into the t
Eugène Delacroix, Liberty Leading the People. Eugène Delacroix, Liberty Leading the People.
Many teens are chronically sleep-deprived, leading to daytime sleepiness. Many teens are chronically sleep-deprived, leading to daytime sleepiness.
Biosynthetic route leading to erythromycin and related antibiotics Biosynthetic route leading to erythromycin and related antibiotics
Two modes of gene amplification leading to drug resistance Two modes of gene amplification leading to drug resistance
Processes leading to allopatric speciation Processes leading to allopatric speciation
Video: Transcription—A molecular view

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