Biden unveils new rules to curb methane, a potent greenhouse gas, from oil and gas operations

Acoustic levitation allows small objects, like droplets of liquid, to float. Unless you travel into the vacuum of space, sound is all around you every day. But most of the time, you probably don't think of it as a physical presence. You hear sounds; you don't touch them. The only exceptions may be loud nightclubs, cars with window-rattling speakers and ultrasound machines that pulverize kidney stones. But even then, you most likely don't think of what you feel as sound itself, but as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words, sound can levitate objects on Earth or in gas-filled enclosures in space. Market benchmarks in Tokyo and Seoul fell 2%, and Hong Kong and Sydney lost more than 3% early today. Oil prices jumped nearly $3 per barrel. Though the U.S. this week announced the repositioning of forces around the Baltics, Biden has said he will not send in troops to fight Russia. Putin announced the operation after the Kremlin said rebels in eastern Ukraine asked Russia for military assistance to help fend off Ukrainian "aggression," an announcement that the White House said was a "false flag" operation to serve as a pretext for an invasion. Putin's announcement came just hours after the Ukrainian president rejected Moscow's claims that his country poses a threat to Russia and made a last-minute plea for peace. Zelenskyy said in an overnight address, speaking in Russian in a direct appeal to Russian citizens. Zelenskyy said he asked to arrange a call with Putin late Wednesday, but the Kremlin did not respond. At an emergency meeting of the U.N. Ever wonder how your camera knows what you're looking at? See more cool camera stuff pictures. ­ Autofocus is that great time saver that is found in one form or another on most cameras today. In most cases, it helps improve the quality of the pictures we take. In this article, you will learn about the two most common forms of autofocus, and find out how to determine which type of autofocus your camera uses. You will also learn some valuable tips about preventing the main causes of blurred pictures when using an autofocus camera. How Do I Know Which Autofocus System My Camera Has? Is Autofocus Always Accurate and Faster? When Should I Use Manual Focus? Autofocus (AF) really could be called power-focus, as it often uses a computer to run a miniature motor that focuses the lens for you. Focusing is the moving of the lens in and out until the sharpest possible image of the subject is projected onto the film. If you're a diehard Netflix user, for instance, make sure to find a player that advertises the ability to stream Netflix content. Luckily, Netflix is one of the most in-demand services, so it shouldn't be hard to find a player with that capability. Devices that can stream Hulu are also relatively easy to find. Another popular service is Amazon Instant Video, with its own vast selection of movies and TV shows. Vudu and iTunes also offer streaming media, but they aren't quite as popular, and you'll have more trouble finding devices that support these services. Besides films and TV shows, you might also be interested in finding devices that support other media. Once you have a good idea of which services you most want, you'll want to know which types of streaming media players are available. Read about them on the next page. In addition to the particular services each one offers, you'll probably want to decide which type of streaming media player works best for you. A magazine called The Web used donations to fund the awards, which recognized sites in 15 categories. Around 700 people attended the first Webby Awards ceremony, which was held at a San Francisco nightclub. In 1998, The Web folded, and the newly formed International Academy of Digital Arts and Sciences took over the Webby Awards. The Academy still exists today -- it's a voting body of Internet experts, business leaders and others. Its purpose is to recognize and encourage high-quality Internet content as well as to provide education and networking for technology professionals and the public. As with the Academy of Motion Picture Arts and Sciences, membership in the Academy of Digital Arts and Sciences is by invitation only. In 2000, about 3,000 people attended the awards ceremony at the San Francisco Opera House. 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