A study has shown that a male zebra finch is less likely to court a female zebra finch if he did not form any social friendships with female zebra finches when younger.

In 1967, the IMAX film system was invented by Canadian Ivan Grame Ferguson to premier at Expo 67.

The first person to die in the electric chair was William Kemmler, an ax murderer from New York on August 6, 1890.

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