A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon (2019)

Post by ilyt » Sat, May 20, 2023, 12:58 PM UTC

denton-scratch wrote: post #5

Article 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…

Post by monetus » Sat, May 20, 2023, 2:02 PM UTC

denton-scratch wrote: post #49

devjab wrote: post #11

Earlier 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…

> 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…

Post by dekhn » Sat, May 20, 2023, 2:33 PM UTC

denton-scratch wrote: post #49

devjab wrote: post #11

Earlier 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…

> 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…

Post by dahart » Sat, May 20, 2023, 2:44 PM UTC

fsckboy wrote: post #6

"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…

Post by fastaguy88 » Sat, May 20, 2023, 3:20 PM UTC

denton-scratch wrote: post #49

devjab wrote: post #11

Earlier 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…

> 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…