Life as we know it needs water, but scientists can’t figure out where Earth’s water came from. Answering that question is just one piece of an even bigger mystery: “Why are we here?” (Updated from 2023)For show transcripts, go to vox.com/unxtranscriptsFor more, go to vox.com/unexplainableVox is also currently running a series called Home Planet, which is all about celebrating Earth in the face of climate change: vox.com/homeplanetAnd please email us! unexplainable@vox.comWe read every email.Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcastsPlease take a second to help us learn more about you! vox.com/podcastsurveyLearn more about your ad choices. Visit podcastchoices.com/adchoices