Happy "Pi Day"! Not pie the pastry, but pi the number.
π.
We use pi to figure the circumference and area of circles and the volume of spheres and cylinders.
Written to two decimal points it equals 3.14, like 3/14 or March 14th.
Written to 100 decimal points...
3.14159265358979323846264338327950288419716939937510582097494459230 78164
062862089986280348253421170679...
I never learned pi past five decimal points. I only remember it because of a chant that I learned in college. From 1993 to 1997 I attended the Illinois Institute of Technology. One of the school chants was:
"Tangent, secant, cosine, sine
3.14159
i, pi, cube root 3
Rock 'em, sock 'em IIT!"
Go Scarlet Hawks!
Friday, March 14, 2014
Thursday, March 13, 2014
"Petoskey Stones" Are Corals - An article from Nature Magazine (January 1942)
Last March I wrote an article about four fossils that had been found around Michigan. One of the fossils that I wrote about was a "Petoskey Stone". A Petoskey Stone is a fossilized colony of Hexagonaria coral which lived in Michigan during the Devonian period (more than 350 million years ago).
Today I was looking through several old copies of Nature Magazine from the 1940s - not to be confused with Nature magazine. Nature Magazine was published by the American Nature Association from 1923 to 1959 before being absorbed by the magazine Natural History. On page 46 of the January 1942 issue of Nature Magazine, I found this short article about the Petoskey Stone that I thought I would share.
Today I was looking through several old copies of Nature Magazine from the 1940s - not to be confused with Nature magazine. Nature Magazine was published by the American Nature Association from 1923 to 1959 before being absorbed by the magazine Natural History. On page 46 of the January 1942 issue of Nature Magazine, I found this short article about the Petoskey Stone that I thought I would share.
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