In the United States, approximately 25,000 eye injuries occur that result in the person becoming totally blind.

The Koala bear is not really a bear, but is really related to the kangaroo and the wombat.

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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