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What has many keys, but can'...

What has many keys, but can't even open a single door?

Correct answers: 47

The first user who solved this task is Djordje Timotijevic.

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A fisherman returned to shore...

A fisherman returned to shore with a giant marlin that was bigger and heavier than him. On the way to the cleaning shed, he ran into a second fisherman who had a stringer with a dozen baby minnows.
The second fisherman looked at the marlin, turned to the first fisherman and said, "Only caught one, eh?"

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Diagnostic public heath laboratory

In 1892, the New York City health department established the first diagnostic public heath laboratory in the U.S. as its Division of Pathology, Bacteriology and Disinfection. It was spurred by the scare of Asiatic cholera at the time. In 1887, Drs. Hermann M. Biggs and T. Mitchell Prudden had been able to isolate cholera vibrios from passengers on a ship of immigrants. Biggs lobbied for the establishment of a laboratory for the purpose, and was able to use this new diagnosis when he was made director of the new Division. From the testing of suspected cholera cases he initiated, he was able to make positive identification of several among them. In 1893, the laboratory expanded its work to test for diphtheria and tuberculosis.*

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