Let’s Beam Signals Into Space and See What Happens
Are the neighbors nice? Humans first beamed signals into space decades ago, hoping for contact, and the recent exoplanet discoveries have intensified interest in communicating across the cosmos. But besides being patient — it would take at least tens of thousands of years for such messages to arrive — shouldn’t we be careful what we say? What happens if they don’t like us? The possibility of attracting unwanted attention has some in the scientific community urging caution while others say we’ll never make friends if we can’t risk rejection.