Landed?

A study, based on isotopes of oxygen in ancient rocks, has suggested that some 3 billion years ago, the Earth was a water planet without any continents (https://www.theguardian.com/science/2020/mar/02/earth-may-have-been-a-water-world-3bn-years-ago-scientists-find). Climate change could, of course, be returning us to close that condition.