So if there were viable silicon lifeforms here, they may have evolved elsewhere. That said, there are arguments in favour of silicon-based life on Earth. Nature is adaptable. A few years ago, scientists at Caltech managed to breed a bacterial protein that created bonds with silicon — essentially bringing silicon to life. So even though silicon is inflexible compared with carbon, it could perhaps find ways to assemble into living organisms, potentially including carbon.
To find it, we have to somehow think outside of the terrestrial biology box and figure out ways of recognising lifeforms that are fundamentally different from the carbon-based form. There are plenty of experiments testing out these alternative biochemistries, such as the one from Caltech.
Regardless of the belief held by many that life exists elsewhere in the universe, we have no evidence for that. So it is important to consider all life as precious, no matter its size, quantity or location.
The Earth supports the only known life in the universe. So no matter what form life elsewhere in the solar system or universe may take, we have to make sure we protect it from harmful contamination — whether it is terrestrial life or alien lifeforms.
So could aliens be among us? This article is republished from The Conversation under a Creative Commons license. Read the original article. We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. Jacobs has interviewed more than a thousand people who claim to have been abducted, using hypnotic regression that apparently allows them to recall their unearthly encounters with aliens.
Mind you, this too is controversial, and Jacobs himself admits that people should be skeptical of these recollections. Chi takes the claims at face value, and links the growing number of abductees cataloged by Jacobs to the increase in atmospheric greenhouse gases. He doesn't imply a cause and effect: The abduction experiment is not responsible for global warming. Rather, it's a reaction to it. The extraterrestrials are producing hybrids that can better withstand the rigors of a toastier planet.
By producing a new model of Homo sapiens , this project would eliminate the need for difficult climate accords or elaborate geoengineering projects. It would also help the aliens themselves — who are said to be living among us — by preserving the part of their DNA that's carried by the temperature-tolerant hybrids.
Of course, human-alien hybrids, no matter how well adapted to a warmer world, don't address the crux of the climate change problem.
Even unimproved humans can handle hotter temperatures; after all, they already live in a plethora of steamy environments including the Congo, Amazonia and downtown Tucson. Rising sea levels could be dealt with too, by building dikes along the seaboards and writing off Miami Beach. But it's the other inhabitants of the planet that are problematic — crops and critters that will either migrate toward the poles or disappear altogether.
These, after all, are essential to both our environment and our food supply. Does the Oxford instructor presume that these other earthly residents are also being re-engineered by the aliens? He said he recognises the galaxy is a big place, there are inhabitable Earth-like worlds throughout the galaxy and some of them could be a biological experiment and there may be intelligent aliens out there who have the capability to travel through space.
However, evidence is still to emerge on the intelligent aliens and he intends "staying on the fence" until there is proof. No single eyewitness account is convincing.
You need corroborated evidence Why would it be so hard with tens or hundreds of thousands of sightings of this transitory phenomena to have true repeatable study-in-the-lab-type evidence that you can look at? It's not happened yet. Prof Impey said astronomers have estimated there are about 30 million Earth-like habitable worlds in the galaxy and each one could potentially be "a biological experiment".
Some radio and optical astronomers have been monitoring for decades in the hope of picking up signals such as pulsed radio or optical messages and they had yet to pick up signs of an intelligent entity. As for alien abduction claims, he said many cases have been studied and they make a meaningful contribution to psychological literature rather than scientific knowledge.
0コメント