To which should you subscribe? When you choose one of them, what happens next? Don't get discouraged and quit, though -- once you learn how to use news feeds, you'll save time by scanning headlines from your favorite sites. On the next page, we'll take a look at how the format got its start and what it was designed to do. Before long, you'll have all the information you could ever read. The Name's Been Changed. Please Make a Note Of It. The original version of RSS, created by UserLand in 1997, stands for RDF Site Summary or Rich Site Summary. Netscape Communications used the technology to deliver content to users of its MyNetscape portal. In 2003, the name changed to Really Simple Syndication with the release of the RSS 2.0 standard when a new team began work on it. Reading RSS feeds can be a great time-saver. In the time it takes you to scan whole Web pages for information, you can review headlines from dozens of sites all collected in one place.
Imagine having to do the work of a jackhammer using a sledgehammer or a pickaxe, and you'll quickly understand how important this one machine is to the construction industry. Concrete, asphalt and rock are hard -- sometimes really hard -- to work with. Thanks to that toughness, roads and building foundations last for decades. But when rebuilding or mining projects require removing these unyielding substances, a sledgehammer just isn't enough. That's when jackhammers come in handy. T-shaped jackhammers are among the most iconic, fearsome and ear-shattering tools on construction and demolition sites. Because they combine two fundamental human hand tools (a hammer and a chisel) in one mechanized body, they are also one of the most useful. We could always go back to the old way -- using heavy-headed sledgehammers -- but there probably aren't enough chiropractors in the world to keep construction workers' backs aligned. Plus, sledgehammers are achingly slow.
Invest in a full-size Secure Digital memory card. You'll have a lot more space at a relatively low cost. The 3-in-1 card reader accepts SDHC and MMC cards, too. This 10.1-inch (25.6-centimeter) display, which has a glossy sheen courtesy of Corning Gorilla Glass, touts a resolution of 1280 by 800 pixels. The screen is multi-touch capable and recognizes six-finger gestures, in addition to the optional, battery-powered pen. Lenovo claims that the screen looks good even at a severe viewing angle of 170 degrees. There are two cameras at your disposal, including the 2-megapixel, front-facing, fixed-focus lens and a 5-megapixel version on the other side. The latter has autofocus. The ThinkPad has four sizable buttons on the bottom side of its face for the purpose of quicker navigation. These buttons take you home, to your browser, back to the previous page and lock auto screen rotation. Each button has an onscreen twin, in case, you know, you'd rather use that one.
These waves travel through space and come in a variety of sizes, or wavelengths. And visible light waves measure about 0.000001 meters, or 0.001 millimeters. The entire collection of waves, across all frequencies, is known as the electromagnetic spectrum. Now consider a wave that falls in a range exactly between 0.001 meters (1 millimeter) and 0.01 meters (10 millimeters). Scientists refer to the energy in this tiny sliver of the electromagnetic spectrum as millimeter wave radiation. Millimeter waves have a variety of uses but are especially important in radio broadcasting and cell phone transmissions. And, because the wavelengths of millimeter waves are large relative to natural and synthetic fibers, they tend to pass through most materials, such as clothing, making them an ideal candidate for scanning technologies. A single machine contains two of these stacks, each surrounded by a curved protective shell known as a radome, connected by a bar that pivots around a central point.
The addition of ethanol to the fuel mix also reduces the amount of gasoline we consume when we drive, and any car can run on this 10-90 ethanol mix (called E10). The 85-15 ethanol mix (called E85) that only fuels special flexible fuel vehicles (FFVs) burns even more cleanly, further reducing the release of harmful gases into the atmosphere that can cause air and water pollution, global warming and smog. It's not commonly stocked in gas stations. Creating significant amounts of energy from food crops would deplete the amount of land available for growing actual food for people to eat. While most experts agree on these two points, they tend to differ in terms of degree. According to Cornell University professor of agriculture David Pimentel, producing ethanol actually creates a net energy loss. And since farmers are using fossil-fuel-powered equipment to plant, maintain and harvest the corn and are using fossil-fuel-powered machinery to process that corn into ethanol and then, in almost all cases, to ship the product to collection points via fuel-powered transport, the ethanol industry is actually burning large amounts of gasoline to produce this alternative fuel.
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Saguaro cactuses are under threat because of climate change - Washington Post
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