How does a hair transplant work? The basic idea is to take hair from the part of your head that still has it (usually the back) and transplant it to the part of your head that no longer has hair (usually the front or the top). Baldness is fairly common, and it is estimated that […]
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When did knights stop wearing armor? Knights stopped wearing armor when muskets began to be used more widely in battles. There are many types of armor, and it has evolved over the centuries. We are all familiar with the iron and then steel armor that knights often wear in movies. We have also probably seen
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Why can’t I walk through a wall? We can’t pass through a wall because of the Pauli Exclusion Principle and because of electromagnetic repulsion. If you think about it on the microscopic level, there is a huge amount of space between the atoms in anything. They are like planets in the solar system. So, if
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How are undersea Internet cables laid? Undersea Internet cables are basically laid by spooling them off a very large ship. When you use the Internet, your computer has to somehow connect to the server where all of the information for whatever site you are searching for is stored. Those servers are in many different countries,
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Why don’t giraffes faint? Giraffes don’t faint because they have a very strong heart and a very high blood pressure. If we bend over and then stand up again, we get a head rush. Sometimes it can be so bad that you faint. This is called orthostatic hypotension. Your blood pressure is set at the
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Why do we say left and right in politics? Left and right came from where politicians were sitting in the assembly hall during the French Revolution. Many democracies use the left and right terms to apply to politics. Left are usually the liberals and right are usually the conservatives. Ultra-left is sometimes considered communist and
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How does a hologram work? There are two types of holograms: the version that has a 3D image on a flat sticker, or plate, and the 3D kind that appears in the air out of nowhere. Surface holograms work by splitting light, and 3D ones work through several methods. A flat hologram is an attempt
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How do oxygen masks on a plane work? Oxygen masks on a plane work by initiating a chemical reaction that produces a relatively small supply of oxygen. Hopefully, you will never have to experience the oxygen masks dropping down while you are on a plane. Flying on a plane is still statistically the safest way
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Why does a paper cut hurt so much? Paper cuts hurt so much because of the roughness of the paper, the places we are most likely to cut, and the size of the cut. The first reason that paper cuts hurt so much is because of the paper itself. Paper is made from a dried
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All 6 volumes now available in 2 book bundles for $4.99 each! Amazon USA UK Japan 1-3 Japan 4-6
Book bundles – Volumes 1-3 and Volumes 4-6 Read More »
