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For many years Richard Hoagland alone hypothesized that sentient beings spent time on Mars millions of years ago assembling behemoth structures whose ruins are still seen today. Here Hoagland redefines the solar system as a different place than NASA has presented. The book includes a new preface covering the Mars Global Surveyor photos and NASA's reactions.

作者简介  · · · · · ·

理查德•霍格兰德（Richard Hoagland）： 资深外星文明研究者及畅销作家，曾在CBS新闻台担任“阿波罗工程”的科学顾问，并任职于NASA喷气推进实验室新闻发布小组。本书在美国一经出版，立即引起了外星文明爱好者的轰动。