Let’s leave the planet Earth for a while.
Imagine: the apex predator species of Earth — that’s you and me, friends — has discovered intelligent life on a planet in the Alpha Centauri system, a trio of stars about 4.3 light years away, our closest stellar neighbors. We learned of this extra-terrestrial intelligence when we monitored radio transmissions of their choral music. A consortium of business and religious organizations funded the acquisition of a mineral-rich asteroid, and drilled a cylindrical hole inside it, so that they could install decks for crew quarters, navigation, food, water, surface landers, and supplies. Our engines draw power from the raw materials of the asteroid and are propelling us inside this rock at an impressive percentage of the speed of light, getting us to Alpha Centauri in about 17 years. (The effects of relativity make it seem like mere months for us.)