She describes how, armed with times-three magnification spectacles, a magnifying glass and a nit comb, she scraped "black specks" from her hair and face on to sticky labels and took them to a dermatologist.
One end has a clip for holding a sample slide, and different levels of magnification are possible.
They also have higher magnification, so can resolve finer details.
A lower-spec version (up to 400x magnification) costs less than 60 cents.The whole device weighs less than 10 grams, can fit in someone's pocket, requires no external power and takes standard microscope slides.
A high-resolution version of this costs less than a dollar, and offers a magnification of up to 2,100 times and a resolving power of less than a micron.
Dr Horowitz has already set up one suitable detector and this, because no huge magnification is involved, is capable of looking at broad swathes of sky.There is also potential for improvement on the radio side.
And always remember that the most important attribute of a telescope is not its magnification, but the size of its light-gathering aperture.
This is the "extreme male brain" theory, that autism is a magnification of normal male mental traits.
Its cells are so well preserved that their nuclei, and in some cases their individual chromosomes, are visible (though not at this magnification, which instead shows the plant's central stem surrounded by frond bases and rootlets).
Another is the trade off between a telescope's field of view and its magnification.
What the combination of this giant lens and Dr Gwinn's computers provides is not so much magnification (the gaseous lens magnifies the pulsar only four times) as resolution the ability to discriminate between objects that are close together.The largest optical telescopes on earth can distinguish between things that are separated by about one second of arc (a 1,296,000th of the celestial equator).
