“Some estimates, based on analyses of the known geometry of space-time, suggest that the "full" universe could extend at least 250 cosmic horizons farther. Other estimates, based on the very rapid expansion-or inflation-of the universe in its very early youth,… — Caleb Scharf Copy Share Image
The universe is almost 14 billion years old, and, wow! Life had no problem starting here on Earth! I think it would be inexcusably egocentric of us to suggest that we're alone in the universe. — Neil deGrasse Tyson Copy Share Image
