A Short History of Nearly Everything

Of course, it is possible that alien beings travel billions of miles to amuse themselves by planting crop circles in Wiltshire or frightening the daylights out of some poor guy in a pickup truck on a lonely road in Arizona (they must have teenagers, after all), but it does seem unlikely.

the Big Bang represents some sort of transition phase,

where the universe went from a form we can’t understand to one we almost can.