I've been pondering this lately: What is the average life-span of every living creature on Earth?
My bet is that it will be quite short, given all the billions of gnats and bugs that wouldn't survive through a whole episode of Seinfeld.
I think if we can work out the average, it will make the human life look long and we can count ourselves lucky. Although that's not really why I want to know, it's just fun to ponder it.
So my opening offer is this: four minutes.
I reckon the average life span of every living creature on Earth is four minutes.
I know there are tortoises that live for centuries, but there aren't very many of them. If anybody has a better offer than four minutes, let's hear it. Is there a more mathematical way of working this out? At the moment I'm just guessing.