A fun new past time

We should scour the moon for ancient traces of aliens, say scientists | Science | The Guardian

Paul Davies makes a fun suggestion:

Prof Paul Davies and Robert Wagner at Arizona State University argue that images of the moon and other information collected by scientists for their research should be scoured for signs of alien intervention. The proposal aims to complement other hunts for alien life, such as the Search for Extraterrestrial Intelligence (Seti), which draws on data from radiotelescopes to scour the heavens for messages beamed into space by alien civilisations.

"Although there is only a tiny probability that alien technology would have left traces on the moon in the form of an artefact or surface modification of lunar features, this location has the virtue of being close, and of preserving traces for an immense duration," the scientists write in a paper published online in the journal Acta Astronautica.

The only thing is, they doubt there is much point in using crowd-sourced examination of the photos due to the potential for disagreement over what is or isn't significant. There is also going to be a lot of material to look through:

The scientists focus their attention on Nasa's Lunar Reconnaissance Orbiter (LRO), which has mapped a quarter of the moon's surface in high resolution since mid-2009. Among these images, scientists have already spotted the Apollo landing sites and all of the Nasa and Soviet unmanned probes, some of which were revealed only by their odd-looking shadows.

Nasa has made more than 340,000 LRO images public, but that figure is expected to reach one million by the time the orbiting probe has mapped the whole lunar surface. "From these numbers, it is obvious that a manual search by a small team is hopeless," the scientists write.