How thick is a human hair? What is the difference between threshold and subthreshold? What was the largest ceratopsian? How many microns (\mu m) make up to 1.003 \ cm? What is the weather like in Spitsbergen? What is the largest unit of length?
Photo: Human hair imaged with a 3D laser microscope 250x magnification. The eye of a fruit fly is also 70 microns across. But the eye itself isn't the smallest unit: each eye is madeup of 760-unit eyes that are about 5 microns in diameter each!This is similar to the placement toleran...
But, from here, you can enter an internal subway (blood or lymph) to get to your final destination in the body. What makes this system particularly astounding is realizing that only one layer of cells – just a few microns thick – separates the contents of the lumen, including those tr...
Compare that to the diameter of fine beach sand (90 microns), and you can imagine how insignificant a shaft of hair feels when you press it between your thumb and index finger! But since the human head has an average of 100,000 hairs – the slightest differences in diameter can become ...
If a single bacterial cell isn't visible to the naked eye, how can we know so much about it? Scientists have developed powerful microscopes to magnify bacteria — usually ranging from one to a handful of microns (one millionth of a meter) in length, giving us a glimpse into their inner...
However, a typical E. coli is only 3 microns long (3 one-thousandths of a millimeter). So to fit inside the cell, the DNA is highly coiled and twisted into one circular chromosome. Complex organisms, like plants and animals, have 50,000 to 100,000 genes on many different chromosomes (...
With hair diameters as small as 18 microns, cashmere is just as soft and fine as merino wool. The high price of cashmere wool, however, comes from the fact that cashmere goats can only produce around 150 grams of wool per year, which makes this type of wool a highly desired commodity....
Water vapor.When plants, soil and other organic matter burn, the water stored in them is released as water vapor. Particle pollution.Wildfire smoke contains high concentrations of the tiny particulate matter with a diameter of 2.5 microns or smaller, known as PM2.5, that are made up of soot...
That's why they offer a pre-filter that's designed to remove particles as small as four microns in size. For those of you who travel abroad and stay in hotels, eat in restaurants and don't plan on wandering off the beaten path, the SteriPEN Classic or Journey might be a better ...
At 12-16 microns, Angora wool fibers are among the finest types of wool fibers in the world, and as a result, Angora wool is remarkably silky and soft. This type of wool is impressively fluffy, and since the cores of Angora rabbit hairs are hollow, Angora wool has better heat retention...