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Can you count the number of ...

Can you count the number of squares in the picture?

Correct answers: 140

The first user who solved this task is Donya Sayah30.

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Late one night a mugger wearin...

Late one night a mugger wearing a ski mask jumped into a path of a well-dressed man and stuck a gun in his ribs "give me your money," he demanded. Indignant, the affluent man replied, "you can't do this – I am a United States congressman!" "In that case," replied the mugger, "give me MY money."

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Hilary Koprowski

Died 11 Apr 2013 at age 96 (born 5 Dec 1916).Polish virologist and immunologist who discovered the first vaccine against poliomyelitis which was based on oral administration of attenuated polio virus. In researching a polio vaccine, he decided to focus on the use of live viruses that were attenuated (rendered non-virulent) instead of the killed viruses that became the basis for the injections created by Jonas Salk. Koprowski viewed the live vaccine as more powerful since it entered the intestinal tract directly and could provide lifelong immunity, whereas the Salk vaccine required boosters. Also, taking a vaccine by mouth is easy, whereas an injection is more expensive and needs medical facilities. It was taken by the first child on 27 Feb 1950 and within 10 years was used for immunization on four continents.

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