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"A couple weeks ago, JC Penney made the news for plummeting in Google rankings for everything from 'area rugs' to 'grommet top curtains.' Turns out the retail site had a number of suspicious links pointing at it that could be traced back to a link network intended to manipulate Google's ranking algorithms. Now, Overstock.com has lost rankings for another type of link that Google finds to be manipulation of their algorithms. This situation has led Google to implement a significant change to their search algorithms, affecting almost 12% of queries in an effort to cull content farms and other webspam. And in the midst of all of this, a company with substantial publicity lately for running a paid link network announces they are getting out of the link business entirely."

Thanks to search engines, most simple facts don't need to be remembered. They can be accessed with a few keystrokes, plucked from ubiquitous server-stored external memory - and that may be changing how our own memories are maintained. A study of 46 college students found lower rates of recall on newly-learned facts when students thought those facts were saved on a computer for later recovery. If you think a fact is conveniently available online, then, you may be less apt to learn it.

US regulators are poised to launch a formal investigation into whether Google has abused its dominance on the web, according to reports. The Federal Trade Commission (FTC) is days away from serving subpoenas on the internet giant in what could be the biggest investigation yet of the search company's business, according to The Wall Street Journal. Both Google and the FTC declined to comment. A wide-ranging investigation into Google has been discussed for months. Google has faced several antitrust probes in recent years, and is already the subject of a similar investigation in Europe. In the US inquiries have so far largely been limited to reviews of the company's mergers and acquisitions.

"But this latest story once again sparked headlines around the world, even if articles often made the point that the research was not peer-reviewed. What was different, however, was Facebook's reaction. Previously, its PR team has gone into overdrive behind the scenes to rubbish this kind of research but said nothing in public. This time they used a new tactic, humour, to undermine the story. Mike Develin, a data scientist for the social network, published a note on Facebook mocking the Princeton team's "innovative use of Google search trends". He went on to use the same techniques to analyse the university's own prospects, concluding that a decline in searches over recent years "suggests that Princeton will have only half its current enrollment by 2018, and by 2021 it will have no students at all". Now, who knows, Facebook may well face an uncertain future. But academics looking to predict its demise have been put on notice - the company employs some pretty smart scientists who may take your research apart and fire back. The gloves are off."

Climategate Coverage: Unfair & Unbalanced

Men and women are different. You know that. But do they tweet differently? Tweetolife is a simple application that lets you compare and contrast what men and women tweet about. Simply type in a search term or phrase and compare. For example, search for love, and 63 percent of tweets that contain that word were from women, based on the sample data collected between November 2009 and February 2010.

By law, neither Facebook nor the government is obliged to inform a user when an account is subject to a search by law enforcement, though prosecutors are required to disclose material evidence to a defendant. Twitter and several other social-media sites have formally adopted a policy to notify users when law enforcement asks to search their profile. Last January, Twitter successfully challenged a gag order imposed by a federal judge that forbade them from informing users that the government had demanded their data. Twitter said in an email message that its policy was "to help users protect their rights." The Facebook spokesperson would not say whether the company had a similar policy to notify users or if it was considering adopting one. REUTERS

"The appealing imagery of a scientist who simply follows his curiosity and then makes a discovery with a large societal payoff is part of the core mythology of post-World War II science policies. The mythology shapes how governments around the world organize, account for, and fund research. A large body of scholarship has critiqued postwar science policies and found that, despite many notable successes, the science policies that may have made sense in the middle of the last century may need updating in the 21st century. In short, investments in "basic research" are not enough. Benoit Godin has asserted (PDF) that: "The problem is that the academic lobby has successfully claimed a monopoly on the creation of new knowledge, and that policy makers have been persuaded to confuse the necessary with the sufficient condition that investment in basic research would by itself necessarily lead to successful applications." Or as Leshner and Cooper declare in The Washington Post: "Federal investments in R&D have fueled half of the nation's economic growth since World War II." A closer look at the actual history of Google reveals how history becomes mythology. The 1994 NSF project that funded the scientific work underpinning the search engine that became Google (as we know it today) was conducted from the start with commercialization in mind: "The technology developed in this project will provide the 'glue' that will make this worldwide collection usable as a unified entity, in a scalable and economically viable fashion." In this case, the scientist following his curiosity had at least one eye simultaneously on commercialization."

The internet: is it changing the way we think? American writer Nicholas Carr's claim that the internet is not only shaping our lives but physically altering our brains has sparked a lively and ongoing debate, says John Naughton. Below, a selection of writers and experts offer their opinion

"The most comprehensive people search on the web" Just enter the name, country etc, to find the person. I must say it's quite interesting and scary at the same time.

Inundated by the deluge of information, and with little time on our hands, some of us turn to social media networks. Sometimes, postings by friends are useful. But often, the typically self-indulgent musings are not. It's "curators" to the rescue.