"If life evolves on a planet with land, instead of only oceans, imagine how much longer it would take to discover boats and submarines that can travel on and un

"If life evolves on a planet with land, instead of only oceans, imagine how much longer it would take to discover boats and submarines that can travel on and under the water!" - Xenobiologists on K2-18b after detecting possible signs of life on the Sol system's third planet.