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Liquid water 'lake' revealed on Mars

bbc.co.uk

411–420 of 495 posts

Re: Liquid water 'lake' revealed on Mars

#411
post #185

Earlier quoted context omitted.

I was talking to an oncologist yesterday. Her biggest frustration is that Silicon Valley billionaires are spending billions upon billions to send things to space, when there are serious problems on Earth that could be fought, most importantly cancer. It’s hard to argue with her. $400B/yr would fund a lot of research that would benefit humanity a lot better than a coordinated mission to Mars, even though it would be v…

An oncologist wishing more money was spent on cancer? In other news, water is wet. First of all, the optimal place for me to spend my money is not necessarily the optimal place for someone else to spend theirs. We can't know for sure, of course, but who were would have preferred Elon Musk start a cancer research firm instead of SpaceX? Secondly, there is no universal "cancer" that we can fight. There are hundreds of…

> An oncologist wishing more money was spent on cancer? In other news, water is wet.

Yeah, because only oncologists care about cancer.

Re: Liquid water 'lake' revealed on Mars

#412
post #7

For those, like me, wondering how this is even possible: In order to remain liquid in such cold conditions (the research team estimate between -10 and -30 Celsius where it meets the ice above), the water likely has a great many salts dissolved in it.

This is one reason why I am VERY skeptical of this conclusion.

From my reading of the article, the primary evidence they have is a bright radar reflection. That is the long-wavelength equivalent of saying "we found some white stuff, it's probably water ice!" There are other things besides water which reflect strongly. The fact that the conditions at the site are extremely non-conducive to liquid water tempers the idea that there's water there. AFAICT, there is nothing null-hypothesis rejecting here. In fact, it seems barely as good as "it's not impossible that it's water." I suspect the current hoopla is premature at best.

Re: Liquid water 'lake' revealed on Mars

#413

Just finished "Red Mars", the book aged quite well for the scifi genre. SPOILER ALERT: The book ends with a dissident faction of Mars settlers living in a hidden water ice dome under the polar cap.

Why the down votes? Fun fact: Mars flag is made from the three books: Red Mars, green Mars, blue Mars

Re: Liquid water 'lake' revealed on Mars

#414
post #153

Earlier quoted context omitted.

That's an amusing thought. Scientist A: "So... where should we send the rover, this marvel of technology?" Scientist B: "How about a random boring spot?" Scientist A: "Sounds good!" (repeat)

That's literally how the famous Hubble Ultra-Deep Field photo came to be. They pointed the Hubble to the most boring spot on the sky they could find, just to see what's there.

You don't understand what "literally", "random", or "boring" mean. The Hubble was pointed at an apparently "empty" area ... that was anything but random:

"Wiliams suspected the billion light-year stare might capture eons of galactic evolution in a single frame and uncover some of the faintest, farthest galaxies ever seen. And to him, the potential observations were so important and so fundamental for understanding how the universe evolved that the experiment was a no-brainer, consequences be damned."

Re: Liquid water 'lake' revealed on Mars

#415
post #414

Earlier quoted context omitted.

That's literally how the famous Hubble Ultra-Deep Field photo came to be. They pointed the Hubble to the most boring spot on the sky they could find, just to see what's there.

You don't understand what "literally", "random", or "boring" mean. The Hubble was pointed at an apparently "empty" area ... that was anything but random: "Wiliams suspected the billion light-year stare might capture eons of galactic evolution in a single frame and uncover some of the faintest, farthest galaxies ever seen. And to him, the potential observations were so important and so fundamental for understanding ho…

I do understand what those words mean, and was playing off the joke made by the GP. Sorry I forgot to include the "smiley face" emoticon in my previous comment.

Re: Liquid water 'lake' revealed on Mars

#416
post #232

Earlier quoted context omitted.

I might be very wrong (as I don’t have right now time to research more) but I think _the calculating machine_ and _the radar_ are things actually created as usable products because the military needed them in the first place. I am not in favor of spending (more) money on military.

Not really, their further development certainly benefitted from military money, but the basics came from civilian need for navigation, in general and in mist.

I'm fairly certain this is not true. Marconi and Hülsmeyer had some early ideas about using radar to find ships, but they weren't really developed and didn't use the pulsed approach that subsequent systems used.

This wikipedia article (https://en.wikipedia.org/wiki/History_of_radar) suggests a huge military involvement from the 1930s onwards

Re: Liquid water 'lake' revealed on Mars

#417

Earlier quoted context omitted.

For any exploratory drilling, or covering any real amount of ground, you need humans. For reference, Opportunity Rover has only traveled 45 km/28 mi in 14 years. A human can collect more specimens in a day than ALL of the rovers have to date. If we remove this year's launch window, you have 10 minimum-energy launch windows in the next 21 years. 2020, 2022, 2024, 2026, 2029, 2031, 2033, 2035, 2037, 2039. If we could g…

I was talking to an oncologist yesterday. Her biggest frustration is that Silicon Valley billionaires are spending billions upon billions to send things to space, when there are serious problems on Earth that could be fought, most importantly cancer. It’s hard to argue with her. $400B/yr would fund a lot of research that would benefit humanity a lot better than a coordinated mission to Mars, even though it would be v…

A lot of technology she takes for granted was built by the space missions. The tech behind CAT and MRI scans are two examples, but there are many more within medicine.

A lot of money is sent to various billionaires. The founder of 5 Hour Energy, for example, spends millions of dollars a year on various medical and green energy projects.

Re: Liquid water 'lake' revealed on Mars

#418

Earlier quoted context omitted.

" I would argue that that is a stronger innate, biological human desire needed for basic evolutionary survival then that for exploration" I would argue both is interconnected. With exploring new areas, whether on earth or on mars, new potential spots for human life gets found/get made inhabitable. And even though human sustainable colonisation on mars is far away, we need to start sometimes. Maybe just to make it a s…

>Besides, there never was a time, when there was no hunger on earth. We produce enough food, now, to feed every human being on this planet. In fact we make 17% more food per person today then we did 30 years ago, even with the population increasing over that time period. [1] Ending hunger is an achievable goal. >I don't think it is smart to stop everything else until we get there Again, no one is saying we "stop ever…

"We produce enough food, now, to feed every human being on this planet."

Production is just a minor part of the problem. Yes, there's an excess of food/water in one places and shortage in others, but how will you get these (often short shelf life) products from former to the latter efficiently? Who will pay for this? It's like saying that we have unlimited energy, because Sun produces vastly more than we need -- yes, technically that's correct, but it takes a hell lot of effort and resources while it reaches you wall socket.

Re: Liquid water 'lake' revealed on Mars

#419

Earlier quoted context omitted.

I think the dialogue quoted here demonstrates the underlying issue that is lost in futurist thought. No one "pioneered the west". Various groups of people with powerful technology traveled west and stole land from other groups of people. They also traveled south and east and used that technical and economic power to enslave other humans and forced them to develop the west. Development and progress for progress' sake…

Of course predatory mammals pioneered the West. Like all predatory mammals; we went in search of better hunting, better hunting grounds and better mates. We still do that today. Imo we will still do that 10,000 years from now... because deep down we are what we are. Edit: We're even "worse" than I gave us credit for. " https://www.bbc.com/news/science-environment-34011026"

Off-topic, but that link was really worth reading, thanks!

Re: Liquid water 'lake' revealed on Mars

#420
post #414

Earlier quoted context omitted.

You don't understand what "literally", "random", or "boring" mean. The Hubble was pointed at an apparently "empty" area ... that was anything but random: "Wiliams suspected the billion light-year stare might capture eons of galactic evolution in a single frame and uncover some of the faintest, farthest galaxies ever seen. And to him, the potential observations were so important and so fundamental for understanding ho…

I do understand what those words mean, and was playing off the joke made by the GP. Sorry I forgot to include the "smiley face" emoticon in my previous comment.

I know that you were playing off the joke, AND I stand by my statement.
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