NASA Data Reveals Mega-Canyon under Greenland Ice Sheet

  Data from a NASA airborne science mission reveals evidence of a large and previously unknown canyon hidden under a mile of Greenland ice.
The canyon has the characteristics of a winding river channel and is at least 460 miles (750 kilometers) long, making it longer than the Grand Canyon. In some places, it is as deep as 2,600 feet (800 meters), on scale with segments of the Grand Canyon. This immense feature is thought to predate the ice sheet that has covered Greenland for the last few million years.

The Top SEO Trends of 2013

Due to the constant evolution of search engine algorithms, it's important to keep your SEO practices up to date. If Google Panda and Penguin (and now, Penguin 2.0) have proven anything, it's that some techniques quickly become outdated. Many tactics that worked last year are completely ineffective now. That's why it's necessary to make the proper adjustments along the way. Let's take a look at some of the top SEO trends of 2013 and how to use them to benefit your campaign.

Mobile, Mobile, Mobile

A few years ago, mobile devices like smartphones and tablets were just starting to catch on. According to Marketing Land, almost 40 percent of people are now accessing the Internet via mobile devices. When it comes to social media, that figure is even higher at 55 percent. If this growth pattern continues, half of all Internet browsing will be done on mobile devices within a few years.

This means it's never been more important to adapt to this trend and make your website content mobile-friendly. Otherwise, you're giving up traffic, conversions and sales. Even if you offer a fantastic product/service and have a great-looking site, mobile users are likely to go to competitors when they have a negative experience on your website due to its lack of mobile-optimization and become frustrated. Luckily, there are a few ways to meet the demand for mobile.

• Create a mobile version of a website
• Implement responsive web design (RWD)
• Utilize a WordPress plugin like UppSite to convert a site into an HTML 5 app

Each of these strategies has advantages and disadvantages, but can help you capitalize on the mobile trend. Creating an alternate mobile version tends to be less expensive than RWD, but causes you to lose valuable link-juice and SEO "equity."

Clarke keeps Australia in control

Australia's captain Michael Clarke soared beyond 150 but his team's progress was pockmarked by wasteful moments from Steve Smith and David Warner on the second morning of the third Investec Ashes Test at Old Trafford. A century beckoned for Smith until he slogged unwisely at Graeme Swann, before Warner - with Clarke's approval - used up the tourists' final review for an obvious edged catch.

Clarke and Brad Haddin took Australia to lunch with plenty of run-scoring intent, and it will now be a question of how many runs Clarke wants and also how much time he believes will be required to press for victory in a match England need only to draw to retain the urn. Clarke's unbeaten innings is his highest against England, and his stand with Smith lifted the visitors to a strong position.