Aliens exist! Tardigrades, sure. But they're out there!
Tardigrades aren't aliens, they're emigrants. Of course from the moon people's pov, they are aliens.
A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
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Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#22Earlier quoted context omitted.
Are you sure? I ask because the Dutch were wild by the end of the seventeenth century, people like Antoni van Leeuwenhoek achieved 500x magnification with a single lens microscope as an example. If you wonder why I know this, it’s because this was when the first bacteria are believed to have been observed. Leading off to the next part that I’m not so sure of, but the single lens microscope was/is terrible to use, and…
I've looked at a couple sources and they all say 250x: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9186497/ https://www.nsf.gov/news/speeches/colwell/rc01_anatlesson/ts...
You seem to be right:
https://denstoredanske.lex.dk/Anton_van_Leeuwenhoek
Says 275x. I guess my education lied to me.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#23Aliens exist! Tardigrades, sure. But they're out there!
Tardigrades aren't aliens, they're emigrants. Of course from the moon people's pov, they are aliens.
Does the term apply like that? At what point would they become alien - small or significant evolution?
Is there a right answer?
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#24Don't worry, they'll be fine.
;)
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#25[flagged]
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#26Article is a bit breathless. > and can be viewed using a microscope capable of 1000x magnification—a technology that has been available for hundreds of years. I don't think so; maybe 100 years. To achieve 1,000x magnification with an optical microscope, you need oil (or some other fluid with a refractive index similar to that of the lens) between the objective lens and the subject. I believe the maximum theoretical m…
Here's a Physics-Stackexchange answer with a little more detail i support:
You can go higher but it won't help you because you won't see more.
https://physics.stackexchange.com/questions/38146/optical-mi...
> ...
> So for violet light λ=405nm, and good lens with oil immersion (NA=1.25), you can have resolution 197nm.
> So, in conclusion, optical microscopes are limited to ~x1500 because going any further does not resolve smaller details.
The comments below the answer add additional details.
Related Wikipedia article (Diffraction-limited system): https://en.wikipedia.org/wiki/Diffraction-limited_system
There are various "tricks" to achieve more -- "Super-resolution microscopy" - https://en.wikipedia.org/wiki/Super-resolution_microscopy
> Super-resolution microscopy is a series of techniques in optical microscopy that allow such images to have resolutions higher than those imposed by the diffraction limit.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#27(2019). I'd be interested to know whether that tardigrade image is actually a photo.
> (2019)
Interesting why this comes up now, then.
> I'd be interested to know whether that tardigrade image is actually a photo.
I'd imagine so. This is exactly what they do look like. Though this is the most detailed image I think that I've ever seen, it is not far beyond other images that I know for certain are not renders.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#28"tardigraves find a way." wikipedia: They have been found in diverse regions of Earth's biosphere – mountaintops, the deep sea, tropical rainforests, and the Antarctic. Tardigrades are among the most resilient animals known, with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvati…
So on some future space mining trip to the moon, these will some how get picked up, then after their long sleep, and some mutations from cosmic rays, will start taking out the crew one by one?
No. Mutation doesn't imply it just morphed for dramatic purposes.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#29The chances that none of the made-made objects that touched the moon carried a few tardigrades is very small anyway. The idea we can move so far away with such complicated processes without any contamination is just a dream, no matter the precautions we take. We can just limit it to the minimum, which is already quite amazing. So the israeli ones are just the one we know about.
you are handwaving decades of strict anti contamination protocol. with all respect, you sound like someone spreading anti vax theories.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#30The chances that none of the made-made objects that touched the moon carried a few tardigrades is very small anyway. The idea we can move so far away with such complicated processes without any contamination is just a dream, no matter the precautions we take. We can just limit it to the minimum, which is already quite amazing. So the israeli ones are just the one we know about.
> So the israeli ones are just the one we know about. Yes, but much easier to condemn in the General Assembly.
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