carldr.com

# Ruby and Unicode

Nope, not the usual boring text encoding stuff, but this :

#!ruby -Ku
module Kernel
  def ∑( *args )  #  Sum of
    args.inject( 0 ) { |i, j| i += j }
  end
  def √( number ) #  Root of
    Math.sqrt( number )
  end
end
puts √(49)
puts ∑(1,2,3,4,5)

Seriously cool. Idea stolen from here.

This photo was taken on August 11th, 1999, from Mir. It shows the moon’s shadow during the solar eclipse which occurred on that day over Europe and Asia. It’s thought that the shadow is above the English Channel, and that the two bright objects to the top-left of the photo are Jupiter and Saturn (Source).

There are some other unusual photos of Earth here.