The elephant's trunk is able to sense the size, shape and temperature of an object. An elephant uses its trunk to lift food and suck up water then pour it into its mouth.

Not all polar bears hibernate; only pregnant females polar bears do.

The postage rate for a letter in 1693 was determined through how much light could pass through the letter. The postage rate would be more expensive if less light went through, and this process was called candling.

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