Kay’s threshold

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Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

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

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

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

Pro and Con: School Uniforms

Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint

8 of the Largest Empires in History

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

11 Egyptian Gods and Goddesses

Kay’s threshold

biology

Learn about this topic in these articles:

diet of primates

In primate: Diet
…point of 500 grams (Kay’s threshold, after the primatologist Richard Kay, who first drew attention to it) has been proposed as an upper limit for species subsisting mainly on insects and a lower limit for those relying on leaves. The reason is that insects are small and hard to…
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