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Extraterrestrial

NASA scientist answers the question - 'do aliens exist ?'

October 26, 2021 | Comment icon 121 comments



Could we really be alone in the universe ? Image Credit: CC0 Pixabay
NASA astrobiologist Lindsay Hays takes a stab at answering one of life's most fundamental questions.
The question of whether we are alone in the universe remains one of the biggest philosophical conundrums of our time. While it seems almost inconceivable that our civilization is alone in the cosmos, the fact still remains that we have yet to see any evidence to the contrary.

For some, scouring the cosmos for signs of alien life has become a life-long passion.

In a recent video (viewable below), astrobiologist Lindsay Hays discusses at length the search for life outside of our planet and exactly where, in our own solar system at least, scientists are looking for it.

Much of the focus has been on looking for signs of microbial life - something that is likely to be far more abundant throughout the universe than complex, sentient beings like ourselves.
"We've only explored a tiny fraction of Mars... and that's only one of the promising bodies to look for life in our solar system," she said.

"There are icy moons in the outer solar system like Saturn's moon Enceladus and Jupiter's moon Europa that look like they may have subsurface oceans that could be habitable."

"And that's just what's in our solar system. The more exoplanets we find around other stars, the more we learn about how many different environments could exist for life."

At the end of the day, given the sheer scale of the universe and the number of planets that we now know exist in our own galaxy alone, the likelihood that the Earth is the only planet on which life has emerged seems unlikely to the extreme.

"Two possibilities exist: either we are alone in the universe or we are not," science fiction writer Arthur C. Clarke once said. "Both are equally terrifying."



Source: Sci Tech Daily | Comments (121)



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Recent comments on this story
Comment icon #112 Posted by Golden Duck 15 days ago
I just watched the second episode of this series.  https://iview.abc.net.au/show/universe-with-brian-cox Has anyone else seen this series?
Comment icon #113 Posted by Manwon Lender 14 days ago
My friend I agree with you completely. Then when you look beyond our Galaxy and look at the current Scientific estimates  at each light speck is a galaxy, some of which are as old as 13.2 billion years – the observable universe is estimated to contain 200 billion to two trillion galaxies. When you view it from the above perspective the odds you speak about because infinite in favor of intelligent life not being a rare or uncommon factor across our Universe.  Peace 
Comment icon #114 Posted by Manwon Lender 14 days ago
That looks like a great series that I would enjoy, but unless it's on YouTube I will never be able to watch it here in Korea. Thanks.  
Comment icon #115 Posted by psyche101 12 days ago
Comment icon #116 Posted by Manwon Lender 12 days ago
  I just purchased the Entire series of the X-Files from Apple, its an oldie but a goodie there are like 240 episode's this will give sate my Sci-Fy fix for long long time!! I have purchased so many these series Box Sets over the years I should own Apple!!!! But the entertainment value is priceless!    
Comment icon #117 Posted by astrobeing 11 days ago
There is no evidence for extraterrestrial life therefore any answer to this question is pure speculation which means all answers are equally correct. "Yes." "No." "Maybe." "I don't know." Take your pick.
Comment icon #118 Posted by jmccr8 11 days ago
Hi Manowon I have a couple of terabytes of movies and shows on an external hard drives, I buy the dvds and put them in a folder that I  can carry and give the dvds to other family members to watch and play forward to others. I am on the road still often enough that I pack a variety of cables and adaptors with my socks and shorts not to mention a laptop, keyboard and mouse(wireless of course) to play with. Usually on the road I do not use my computer to be active at sites like this because I have to use their service and only use my phone for activities here. I keep a lot of ideas on my laptop ... [More]
Comment icon #119 Posted by Manwon Lender 11 days ago
As far as using the internet goes I never have worry about intrusion no matter where I go. During all the years I spent in Government service I made a lot connections. I gentleman I became friends with designed encrypted programs for the US Government as a contractor and he also sells variations of his designs on the civilian market to defense contractors but he doesn't sell to the General public. All my computers are Apple Products, when are basically immune to Virus and intrusions, but with the additional I have a encrypted program that will not all any intrusion past my router. If someone c... [More]
Comment icon #120 Posted by jmccr8 10 days ago
Hi Manwon I don't have the type of security that allows me the same confidence that you have. The systems I do use are compatible with each other and run my cleaner several times a day depending on use, I started using a computer in 2009 which is when I joined this site and it wasn't much more than a glorified tv for the first several years. All of my computers are HP and I use an Iphone, and in my experience apple is good but they spy on you as well which is why I leave it sitting somewhere when I am working and not on me at all times. I don't use free wifi as I have plenty of gigs on my plan... [More]
Comment icon #121 Posted by Manwon Lender 8 days ago
My first introduction to a Computer was during my Miltiary Career, below is of the model I learned on its Wang model 240. It had MS-DOS 2.1, and 5.25 floppy disk drive that would store a wopping 1.2 MB, it had very early Intel 286 processor. and the system was Command Prompted, so you had to type in the necessary code to open file ups and access the Floppy Drive. I was sent to school for two week to learn how to use the system. It also came with Microsoft Basic which a computer language that allowed you to make your own programs. Man I thought I was in heaven, this was the future man and I was... [More]


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