The Economist publishes ..
Which is, by the way, another Britain weekly newspaper.
Cool.
Imagine if we ever have a solar currency, then we will have to increase the block time and a bitcoin based currency will be the only one available.
It takes 12 - 22 minutes for light to reach Mars from Earth. It takes light from the sun about 10 minutes to reach Earth.
10 minutes is probably just a 'good time'. Most things take ten minutes long. "Just ten more minutes!" is a common expression. It's an appropriate amount of time to see what's going on and to respond as a normal human person, but not too long that you have to wait for much longer. It's a good amount of time for being able to debug, simulate, or have a presentation with the important facts.
There are so many ridiculous numbers. People will find patterns in anything. Some of those patterns may mean something, and others may mean nothing.