Earlier quoted context omitted.
> 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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A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
61–69 of 69 posts
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#62Earlier quoted context omitted.
> 2,500x magnification You can, of course, magnify as much as you want; but you won't see more detail. "Junior" microscopes often brag of a 1000x magnification; but that only works if the lenses are really good, and in that kind of microscope, they aren't. You need 1000x to see bacteria. Bacteria are really boring to look at; they appear as undifferentiated spheres or rods. And even then you can't see them at all wit…
Happen to blog about it, or have some links?
I bought from these people:
http://www.brunelmicroscopes.co.uk/
They have some good pages on choosing a microscope.
There are sites dealing with amateur microscopy that have many pages of advice on setting-up and using microscopes, and on staining and slide preparation.
I don't blog, at least not at the moment.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#63Earlier quoted context omitted.
> 2,500x magnification You can, of course, magnify as much as you want; but you won't see more detail. "Junior" microscopes often brag of a 1000x magnification; but that only works if the lenses are really good, and in that kind of microscope, they aren't. You need 1000x to see bacteria. Bacteria are really boring to look at; they appear as undifferentiated spheres or rods. And even then you can't see them at all wit…
tardigrades are far more interesting to look at than bacteria. Basically all the tiny animacules. You need no more than 5X-10X and are quite easy to see when they're still alive.
10x is good enough for many interesting subjects. Stuff like daphnia, and especially diatoms. I'd like to have a source of diatoms. I tried car-body rubbing compound, which is sometimes made with diatoms, but I don't think the stuff I tried had diatoms in it.
I spent a feverish couple of weeks learning about microscopy and slide-preparation, before handing over the 'scope I bought to my son, to save him time doing the research himself (I guess I was afraid he'd be too busy). I've handed it over now; but I bought myself a 10x and 20x hand-lens.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#64Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#65Earlier quoted context omitted.
google gives the definition "supposedly from another world". tardigrades are from this world. i wouldnt define a mars born human as alien, so i wouldnt say its based on where that generation was born either. evolutionarily, i suppose for me the dividing line is when the creature has evolved to the point where its more at home in its new habitat than its old. i dont think youre ever going to get a bullet proof, except…
> tardigrades are from this world. There are plenty of them here, but did they evolve on Earth or arrive from elsewhere...?
They are DNA-based organisms, like every other known life form, all of which evolved on Earth, so it seems reasonable to assume they evolved here too. Of course you might hypothesize that DNA is a building block of life that is not unique to Earth, but that's a whole other can of worms...
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#66Earlier quoted context omitted.
tardigrades are far more interesting to look at than bacteria. Basically all the tiny animacules. You need no more than 5X-10X and are quite easy to see when they're still alive.
10x is good enough for many interesting subjects. Stuff like daphnia, and especially diatoms. I'd like to have a source of diatoms. I tried car-body rubbing compound, which is sometimes made with diatoms, but I don't think the stuff I tried had diatoms in it. I spent a feverish couple of weeks learning about microscopy and slide-preparation, before handing over the 'scope I bought to my son, to save him time doing th…
You can order live diatoms from Carolina Biological:
https://www.carolina.com/algae/diatoms-living/FAM_153020.pr
you can grow the culture you get from them continuously if you enjoy keeping algae pets. note that diatom are really hard to see, and you do want very high magnification.
These days I don't really use slides- I found that glass-bottom petri dishes work well, but that's at least partly because I do inverted imaging (objective pointing up, through the sample, towards the illumination) with a custom-built XY stage microscope.
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#67Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#68Earlier quoted context omitted.
> (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.
It doesn't appear to be standing on anything though - could it have been suspended in a liquid of the same density as itself? Despite the image being credited to Getty Images, I couldn't find it in their catalogue.
> could it have been suspended in a liquid of the same density as itself
Re: A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)
#69Earlier quoted context omitted.
Wait, no more.
> Wait, no more. Commas matter -- e.g., "No more tequila" vs. "No, more tequila."
Does it change meaning in this case? Wait. Drama Pause. No more.
Usually Grammarly catches these errors, but it doesn't work on HN for some idiotic reason.