Why Fossils on Mars Would Be Bad News

1211614083_6742 Nick Bostrom in the Boston Globe:

Discovering traces of life on Mars would be of tremendous scientific significance: The first time that any signs of extraterrestrial life had ever been detected. Many people would also find it heartening to learn that we’re not entirely alone in this vast, cold cosmos.

They shouldn’t. If they were wise, they’d hope that our probes discover nothing. It would be great news to find that Mars is a completely sterile planet.

On the other hand, if we discovered traces of some simple extinct life form – a bacterium, some algae – it would be bad news. If we found fossils of something even more advanced, like a trilobite or even the skeleton of a small mammal, it would be horrible news. The more complex the life we found, the more depressing. Scientifically interesting, yes, but dire news for the future of the human race.

Why? To understand the real meaning of such a discovery is to realize just what it means that the universe has been so silent for so long – why we have been listening for other civilizations for decades and yet have heard nothing.