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Nasa book suggests that ancient rock art could have been created by extraterrestrials

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Each month a new planet is discovered that bears similarities to our own – and it is becoming increasingly apparent Earth is not unique.

So it stands to reason that of the billions of Earth-like planets in our galaxy alone, there might be another that hosts life.

It’s a thought that is gaining more credence all the time, and now Nasa has released a fascinating book detailing how, or if, we might communicate with some of these worlds.

Some of the most interesting chapters tackle the issue of alien communication in the past, present and future.
In one section, for example, William Edmondson from the University of Birmingham considers the possibility that rock art on Earth is of extraterrestrial origin.

‘We can say little, if anything, about what these patterns signify, why they were cut into rocks, or who created them,’ he writes.
‘For all intents and purposes, they might have been made by aliens.’

The book is titled Archaeology, Anthropology and Interstellar Communication.

THE HISTORY OF SETI

In 1959, Cornell physicists Gieuseppi Cocconi and Philip Morrison published an article discussing the potential to use microwave radio to communicate between stars.

A year later in 1960, astronomer Frank Drake conducted the first hunt for alien life with an 85-foot (25 metres) antenna in West Virgina, but after two months concedes defeat.

In the 1960s, Soviet Union performs extensive searches for ET, again with no success.

In the 1970s Nasa began to take an interest in Seti, with the chances of success seemingly growing as technology advanced.

In 1988, Nasa began sweeping surveys of the night sky for signals, but Congress terminated funding a few years later.

The independent Seti Institute, established in 1984, took over the job.

In 1992 the first planet outside the solar system is confirmed, an almost certainly uninhabitable world orbiting a pulsar.

In 2009 Nasa’s Kepler telescope launches and, over the next few years, finds hundreds of planets.

And just last month, the first planet of a similar size to Earth and at the correct distance from its parent star to host water, called Kepler 186-f, was found.

It is the most likely place that has been found that could host life as we know it.

It was edited for Nasa by Douglas Vakoch, Director of Interstellar Message Composition at the Seti Institute.

With the help of other experts he tackles a number of topics including the prospect of life on other planets and the means through which we might send or receive a message.

Vakoch begins the 330-page book by postulating how difficult it might be to make first contact.

‘If a radio signal is detected in a modern Seti experiment, we could well know that another intelligence exists, but not know what they are saying,’ he writes in the book’s introduction.

He goes on to add: ‘Even if we detect a civilisation circling one of our nearest stellar neighbours, its signals will have traversed trillions of miles, reaching Earth after travelling for years.’

But, all hope is not lost – throughout the book Vakoch and his colleagues tackle these very problems, and provide solutions that may prove invaluable in the future.

‘To move beyond the mere detection of such intelligence, and to have any realistic chance of comprehending it, we can gain much from the lessons learned by researchers facing similar challenges on Earth,’ he continues.

‘Like archaeologists who reconstruct temporally distant civilisations from fragmentary evidence, Seti researchers will be expected to reconstruct distant civilisations separated from us by vast expanses of space as well as time.

Nasa book suggests that ancient rock art could have been created by extraterrestrials

Rock art, an example in Niger pictured, is cited as one possible example of aliens visiting Earth before. Ultimately, however, the authors detail some of the methods we might employ to search for alien life including scouring exoplanets for signs of civilisation

‘As we attempt to decode and interpret extraterrestrial messages, we will be required to comprehend the mindset of a species that is radically Other.’

Elsewhere in the compendium the authors tackle the question of the possible biology, evolution and physics of an extraterrestrial race. 

Vakoch explains how the methods via which aliens communicate might be vastly different from our own, making contact difficult.

He says that messaging through sound, as we are used to on Earth, might not be possible.

Nasa book suggests that ancient rock art could have been created by extraterrestrials

The authors also detail way we could send messages of our own through methods such as Active Seti, using giant radio dishes like the Arecibo Observatory in Puerto Rico Photo by: pictured

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‘On the other hand, vision and the use of images would appear to be at least plausible,’ he writes.

And, he adds, imaging the surface of habitable planets in the future might reveal ‘the physical arrangement of objects’ that suggests the presence of alien life. 

Edmondson suggests, for example, that ‘an optical telescope of diameter 620 miles (1,000 miles) could resolve an object of diameter one kilometre (0.62 miles) at a distance of 100 light-years.’

Vakoch concludes his introduction with the monumental task awaiting scientists and scholars across the world, but highlights the importance of these studies and research.

‘These scholars are grappling with some of the enormous challenges that will face humanity if an information-rich signal emanating from another world is detected,’ he writes.

‘By drawing on issues at the core of contemporary archaeology and anthropology, we can be much better prepared for contact with an extraterrestrial civilisation, should that day ever come.’

 

Source www.dailymail.co.uk

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Nasa book suggests that ancient rock art could have been created by extraterrestrials

 
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