How can we treat the brothers on reason when arrive on Earth? The Drake equation was derived by astronomer Frank Drake in the middle of the last century in an attempt to count the number of civilizations in our galaxy.
The first factor in the equation – the estimated number of stars in our galaxy – 200 billion. The second – the number of planets orbiting each star. A couple of other factors determine how many of these planets originated life, a couple of – what part of that is a sensible life, able to communicate with us. Continue reading “Aliens are good, bad or indifferent?”