Habitability and Cosmic Catastrophes - Arnold Hanslmeier - Google Books

https://books.google.de/books?id=PRqVqQKao9QC&pg=PA196#v=onepage

The search for life in the universe is one of the most challenging topics of science. It is not a modern topic at all, since more than 100 years ago, it was speculated that on the Moon, there are oceans and seas; on Venus, there are swamps and also Mars is…