The influence of gaslight or electric light on the growth of paraheliotropic trees

http://en.wikipedia.org/wiki/Ship_of_Theseus

In Greek mythology, Janus (or Ianus) was the god of gates, doors, doorways, beginnings and endings. His most prominent remnants in modern culture are his namesakes: the month of January, which begins the new year, and the janitor, who is a caretaker of doors and halls. — From Wikipedia, Janus. http://en.wikipedia.org/wiki/Janus

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God Created the Integers
God Created the Integers: The Mathematical Breakthroughs That Changed History is an anthology of English translations of important works in …

“God made the integers; all else is the work of man.”
– Leo Kronecker

(Unsure if this is actually true; Under what basis can one argue that pi is not a real empirical number. Though it’s a good question — are there real circles in nature? I think so. The sphere or almosts-sphere is definitely empirical.)