Administered orally, the Sabin vaccine was used to combat polio.
(This is a fascinating story. Alfred S. Sabin created a live, mutant, harmless, form of polio that would overrun the intestines thereby preventing the dangerous version from gaining a foothold. He also experimented on himself before giving it to others.)
Today's Question:
Which of these years are leap years? 1300, 1600, 1900, 2200, 1400, 1700, 2000, 2300, 1500
It would seem sensible to suppose all of these years are leap years since 2000 was however I don't think it is that simple long-term. Because a year is a little less than 365.25 days long I think there is more to the equation than if it were exactly an extra quarter of a day in length.
(Sources: American Mensa, email transmission, October 3rd, 2011; http://sabin.org/about-us/history; http://www.wired.com/images/article/full/2008/09/sabin_350px.jpg)
Compiled by Otto Ladensack for Patricia Ladensack
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