children successor rule number learning chimpanzees

Children can learn an endless number sequence from one rule

Around age five or six, children can realize that each counting number is one more than the number before it. Once they understand this rule, they do not need to learn every larger number separately. In experiments, chimpanzees instead needed thousands of trials to learn the symbols for 1 through 9 one by one.

Washington buildings are limited by street width

A 1910 law limits building height according to the width of the street beside it, rather than by a limit tied to the Capitol or Washington Monument. City leaders have cited the rule as a reason for limited affordable housing and sprawl across the metro area.

Human activity can erode the Moon’s astronomy advantages

The Moon’s permanently dark, cold polar craters suit infrared telescopes, while its far side is shielded from radio emissions from Earth. Increased human activity can spread lunar dust and erode these observing advantages unless the dust’s spread is limited.

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children successor rule number learning chimpanzees

Children can learn an endless number sequence from one rule

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