Secret Mars

Michael J. Craig asks why NASA has not made public what he considers the most significant finding in the history of space exploration. While agencies spend heavily trying to confirm microbial life in Martian soil, he argues that people studying Mars photographs from their home computers have been turning up something far more striking: possible ruins of an extraterrestrial civilization.

The book is built around more than 160 images captured by American and European spacecraft. Rather than telling readers what to conclude, it lays out these pictures and invites them to study the evidence and form their own judgment. The author maintains that the material suggests a civilization once lived on Mars, and may still exist there, and that scientists are overlooking it.

This is a fully revised edition of a book first published in Britain in 2013. Its emphasis is visual, with the photographs forming the core of the presentation.