30. In 2008, archeologists uncovered the colossal marble foot of a statue of Roman Emperor Marcus Aurelius (reigned 161-180 A.D.) in Sagalassos, Turkey.
The legendary emperor, often likened to Plato's ideal of a "philosopher king," wore army boots decorated with lion skins.
50-75% of Sun-like stars have rocky planets sitting in a habitable zone that accommodates liquid water:
arxiv.org/abs/2010.14812
That adds up to at least 300 million, likely 2-5 billion, Earth-like worlds in our galaxy, >4 of them within 33 lightyears.
technologyreview.com/2020/11/06/101…