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석완징

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MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?

Penicillin test

In 1940, in one of the most famous animal tests in medical history, eight mice were inoculated with a lethal dose of streptococci and then four of them were injected with penicillin. Next day the four mice given streptococci alone were dead, the four with penicillin were healthy. Oxford scientists Howard Florey, Ernst Chain and Norman Heatley had revived Alexander Fleming's work. They produced enough antibiotic to test by isolating the active ingredient from what Fleming had called “mould juice,” Ten years before, Fleming's interest had waned when he found penicillin production to be difficult, that it was very unstable, had no effect on certain bacteria (cholera, bubonic plague) and didn't work in animals when given by mouth.«

A man is driving with his wife...

A man is driving with his wife at his side and his mother-in-law in the backseat. The women just won't leave him alone.

His mother-in-law says, "You're driving too fast!"

His wife says, "Stay more to the left."

After ten mixed orders, the man turns to his wife and asks, "Who's driving this car - you or your mother?"
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