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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

This jumping spider's main ocelli (center pair) are very acute. This jumping spider's main ocelli (center pair) are very acute.
A depiction of slaves on a South Carolina plantation, around 1790. Likely of Yoruba descent, they pl A depiction of slaves on a South Carolina plantation, around 1790. Likely of Yoruba descent, they pl
Sterilizing Instruments in an Autoclave Sterilizing Instruments in an Autoclave
Who Takes Care of the Children While the Mothers Are at Work? Who Takes Care of the Children While the Mothers Are at Work?
Poor single parents and their children Poor single parents and their children
Children's Thinking (4e) By Martha W. Alibali Children's Thinking (4e) By Martha W. Alibali
Video: Introduction to Genetics

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