According to a new scientific study, e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ probes may be hiding in near-Earth asteroids watching us. James Benford scientist and current president of the space organization Microwave Sciences in Lafayette, California says that asteroids close to the planet could serve as a “cache” for A̳n̳c̳i̳e̳n̳t̳ robotic probes sent by distant a̳l̳i̳e̳n̳ c̳i̳v̳i̳l̳i̳z̳a̳t̳i̳o̳n̳s̳.
In a paper published long ago in the Astronomical Journal, titled “Marauders: Co-orbiters as SETI Observations,” Benford states that these “INVADERS” are hidden, unknown probes that have been studying Earth for years. For the specialist these probes may be waiting on these rocky objects until we can find them. They could remain completely silent, transmitting only data. If we did find one it would be possible to simply take a picture and send a message to let people know we saw it and then we would snap out of their lethargy.
The latter idea is primarily based on the Bracewell spacecraft, an as-yet-hypothetical concept for an interstellar and autonomous probe to be able to communicate with various e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ c̳i̳v̳i̳l̳i̳z̳a̳t̳i̳o̳n̳s̳. This theory generated some controversy in the astronomical community. But it also raises a good question; the process of searching for A̳n̳c̳i̳e̳n̳t̳ e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ spacecraft near Earth could be crucial to our eventual understanding of the possibilities of intelligent life in our galaxy.
In the event that no hidden objects are found on asteroids revolving around the Sun or in an Earth-like orbital path, e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ c̳i̳v̳i̳l̳i̳z̳a̳t̳i̳o̳n̳s̳ in our galaxy are likely to be extremely sparse or ultimately non-existent.
But this is not the first time that Benford has spoken of the existence of e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ life. In 2010 he concluded that SETI scientists had strayed from the focus needed over the past fifty years as only beeps and sounds from selected nearby stars were heard but no artificial sound. SETI scientists have advanced hypotheses to change the method of receiving and transmitting frequencies, also because a̳l̳i̳e̳n̳ c̳i̳v̳i̳l̳i̳z̳a̳t̳i̳o̳n̳s̳ may not use the same range of radio frequencies that we use.
According to the expert, regardless of the way of life, evolution selects the economy of resources. Transmitting information in light years is extremely expensive and would require a huge amount of resources. An advanced e̳x̳t̳r̳a̳t̳e̳r̳r̳e̳s̳t̳r̳i̳a̳l̳ civilization would minimize costs anyway so it would be a waste to send such a message if its technology is not sufficient.