Air Molecules, Neuron-firing, Carl Sagan

Mathematically-speaking, you've been breathing some mighty famous air:

http://io9.com/5635391/youve-probably-shared-the-same-air-with-galileo

(not sure if the actual mathematics of this holds up to closer scrutiny...?)

And from the same blog, a story that's been making the rounds about an electronic contraption for brain stimulation that might aid mathematical thinking:

http://tinyurl.com/3695xty

Not precisely math-related, but on the heels of a day celebrating Martin Gardner, I feel I'd be remiss if I didn't note that a day celebrating Carl Sagan is coming up:

http://www.centerforinquiry.net/carlsaganday