perspective

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Examine the observable universe's place within the whole universe

Understand Albert Einstein's theory of relativity, about what is absolute and not relative

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New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.

Why Is It Called Black Friday?

Diverse elementary school children wearing school uniforms running outside of school. Boys girls

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Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that

America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)

Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)

8 Unusual Punishments Inflicted on Women Throughout History

Thanksgiving Celebration Traditional Dinner Setting Food Concept

Why Is Thanksgiving in the U.S. Celebrated on a Thursday?

Thanksgiving Turkey with all the sides

Why Do We Eat Turkey on Thanksgiving?

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

perspective

physiology

Learn about this topic in these articles:

depth perception mechanism

In human eye: Monocular cues
Perspective, by which is meant the changed appearance of an object when it is viewed from different angles, is another important clue to depth. Thus, the projected retinal image of an object in space may be represented as a series of lines on a plane—e.g.,…
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visual illusion

$optical illusion: refraction of light$
In illusion: Visual perceptual illusions
In a related experience, linear perspective creates the illusion that parallel lines or contours (such as railroad tracks) converge as they recede from the viewer.
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