At Battlacaloa, Sri Lanka, there is a salt water lake which on calm nights, especially when there is a full moon, emits clear musical notes.
The largest plants in the world are the giant redwood trees of North America. Sequoias can grow up to 107 m or more in height and may be up to 7.5 m across.
In Russia the keen eyesight of the pigeon is put to a very practical use for, at one factory in Moscow, they are used to sort ball-bearings. After four or five weeks special training, the birds inspect the ball-bearings as they pass on a conveyor.
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