Category: Science and Tech

Where Does Daylight Savings Come From?

Now that daylight savings has come to a close, many people are wondering when and why the practice was started in the first place.

Ben Franklin was actually the first to suggest the concept. Franklin wrote of being awakened at 6 a.m. while serving as an ambassador to France, and of being surprised to note that the sun rose much earlier than he normally did. He realized that enormous amounts of resources would be saved if he and his companions rose before noon, and by doing so burned less midnight oil. He then wrote to a newspaper of his idea. So, he was the first to understand that daylight should be taken advantage of; however, he did not really know what to do with his realization.

Daylight savings were recognized in a more major way during World War I. Germany was the first state to implement the time changes, as a means of reducing artificial lighting to save coal for the war. The practice was soon adopted by many.
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In 1918 the U.S. federal law set the start and end of daylight saving time for the states that chose to follow it. In World War II, however, daylight savings became mandatory for the whole country, also as a way to save war resources. After the war ended, daylight savings became optional once again.

Water Found on Moon

There are some places on the moon that are wetter than some pretty dry places on earth, like the Sahara Desert. According to the results of an experiment conducted last October by NASA scientists, water, in the form of ice, mixed with soil, was discovered at the bottom of a crater which never sees light, near the south pole of the moon. The dry Sahara sands vary in their water content from about 2 to 5 percent. The water content in the soil in the 60-mile-wide, 2-mile-deep crater named Cabeus was estimated to range from 5.6 percent to as much as 8.5 percent.

NASA scientists, who have been pushing for a return of earthlings to the moon, believe that it would be possible to use this water for drinking after extraction from the soil and then purification. They also speculate that the water could even be used for rocket fuel after the moon water is broken down into its component parts, hydrogen and oxygen, using the fuel to either get back home to earth, or travel on to Mars and beyond.

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Unfortunately the hopes of NASA for further moon explorations have recently been dashed. Despite the fact that five years ago the Bush administration supported NASA’s new “Constellation” program to send astronauts back to the moon, President Obama nixed the plan, stating that the plan is too expensive, and anyway “we have already been there.” A compromise plan was reached, passed by Congress and signed by Obama just last week, postponing the program for now, at least for explorers of the human variety.

Are Broken Bones Stronger After They Heal?

Perhaps you have heard this pseudo-fact, or ‘old wives tale’? the logic goes like this: Since we know that bones, just like muscles, grow and strengthen when worked out or put under pressure, therefore the more pressure the bone is under, the stronger it will become. This is a fact, but only up to a point. This explains why certain athletes, such as fencers and tennis players, develop greater bone mass in the arms and legs which they use more in their game; and it also explains why astronauts, under the influence of almost zero gravity, develop bone loss while in space.

However, there is no evidence that a healed broken bone is any stronger than it was before the break. The way a bone heals itself is a remarkable process. First something called a callus forms at the site of the fracture. Calcium is deposited there as an aid to the eventual rebuilding of the bone. The plaster cast which is usually put on the limb is there to protect the site so that it can heal unimpeded. And since there is actually no pressure placed on the limb during healing, the bone there actually becomes weaker, with the exception of the site where the callus is being formed, the place where calcium is being deposited.

The result of this amazing natural process is that there might be a short period during the healing process when the site of the fracture is actually stronger than the bone surrounding it. But later, when you begin to use your arm once again, the areas will reach equal strength. The place of the break is no more, or less, likely to break again. In tests done on healed fractures, the likelihood of another break was equally distributed, including along the place of the previous fracture.
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I wouldn’t be too disappointed. After all, how many other things are even as strong as they were before  breaking? That’s the problem with those old wives tales. They just don’t appreciate what we do have.

Making Time for Loved Ones

Often, when we first begin a new schedule, it can be very difficult to fit everything in.  This is often a real challenge for students, who have moved away from home for the first time and are having to manage everything on their own.  What happens is that they have a hard time getting their priorities right.  It’s not that they are doing this intentionally; it’s more a case of not knowing how to juggle everything. But, this need not necessarily be a problem.  Students would be well advised to write down a list of priorities and then workPDE5-inhibitors are prescription-only medications and are ought to be india sildenafil used by all types of men. Previously inspired by the boldness of Joan Mitchell et al, he saw a raw, minimalist simplicity in sildenafil bulk Craighead’s work, which not only captures a person’s attention, but also provides a place for them to rest their eyes. What is COPD? Chronic Obstructive Pulmonary Disease popularly referred to as COPD is a progressive disease that happens to make breathing difficult. https://unica-web.com/archive/2007/hitlergruss.pdf order levitra online Perfectly balanced with vitamins A, tadalafil 50mg unica-web.com B5, C, D, and E. out how to stick to it.  It is all too easy to forget about loved ones, especially when they are all too often far way geographically.  But these days, with cheap phone plans, IM and even Skype, staying in touch has never been easier.  Remember the days when it would take up to a week for a letter to travel overseas; now you can access those important to you with the mere click of a button.  So make sure you have your Skype or other piece of technology set up ahead of time and that way you will find it easy and fun to stay in touch.

Have You Ever Wondered “What Global Warming Is?”

We hear a lot about global warming these days. But really, what is it? Put simply, since the middle of the 20th century scientists and researchers noticed a definite increase in the average temperature near the surface of the earth, namely in the oceans and in the air near the surface of the planet.  This temperature increase is believed to be caused by burning of large amounts of fossil fuels, such as coal and oil. Upon burning fossil fuels release gasses into the atmosphere. These gasses are called ‘greenhouse gasses’ because they have a similar effect on earth as a greenhouse has, namely the gasses trap the radiant heat from the sun close to the surface of the earth, making it difficult for the extra heat to escape.

Deforestation, the cutting down of trees, contributes to the effects of global warming. Living trees and other vegetation remove carbon from the atmosphere, (carbon dioxide) and release oxygen through the process of photosynthesis, a crucial part of the earth’s healthy functioning. The fewer trees the more carbon remains in the atmosphere, a major component of greenhouse gasses.

It is feared that as a result of continued global warming the sea level will rise and weather patterns will change, creating more extreme weather conditions, and perhaps contributing to the extinction of more vulnerable species, and unknown changes in agricultural yields.
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Many of the effects of global warming are still uncertain, but international efforts are being made to try and stop and even reverse the global warming trend as a prudent measure of caution.

How Hubble Works: Part 3

The Hubble Space Telescope is in orbit around the earth, completing one orbit every 97 minutes. At 5 miles per second, the speed at which Hubble is orbiting, it would be possible to travel the span of the entire United States in just 10 minutes. During its travels Hubble’s mirror catches light from space and passes it into several different scientific instruments.
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Hubble is outfitted with several different instruments which examine the incoming light from space in different ways. Together the information gathered from the many instruments on Hubble can give a more complete picture of the universe, extending and expanding our knowledge astronomically.