This weekend, powerful winds blasting across Lake Superior created monster waves that exploded like bombs when they struck the shore. My daughter Katherine and I spent some time along the lake, leaning into the wind and watching nature have its way on this watery planet. Astronomers are constantly on the lookout for planets orbiting within the habitable zones of their host suns. These are places at the right distance from a star where a rocky planet would be warmed enough for liquid water to pool on its surface. Water is quintessential to life on Earth, so if we’re going to start the search for alien life, a watery planet’s a good choice.