A molecule from Julius Caesar’s last breath
As you take a drink of the lovely air around you do take time out to think about where else it has been. Molecules are ever so small, and ever so numerous. In fact if we take it as given that two thousand years is enough time to mix up all the gases in the atmosphere, there is a 98.2% likelihood of at least one molecule from Julius Caesar’s final exhalation is bobbing around in your lungs right now.
via Berkeley
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