Have you noticed the funny little man with an old phone on today's Google™ logo?
The mouseover text informs you that it's Alexander Graham Bell. And a little common sense (or a little research) should lead you to realize that it's the anniversary of his birthday.
A quote to commemorate the occasion:
The thorax is the treasure-house of the human body,--a veritable strong-room, girt about with walls of bone for the protection of those precious organs the heart and lungs. Let us imagine ourselves for a moment inside the thorax, but first, with your permission, let us empty this safe-deposit vault of its valuable contents, so that we my have space for exploration.
When the logo is taken down you might still find it here.