Astronomy
The Fermi Paradox and Its Plausible Resolutions
Quick fact
Enrico Fermi famously asked 'Where is everybody?' in 1950, pointing out that even at sub-light speeds, a galactic civilization could colonize the entire Milky Way in mere millions of years—a blink in cosmic time.
Why this is interesting
With billions of stars in our galaxy alone, where is everyone? The universe seems silent, and that silence is a profound mystery.