Geological Truisms Questioned

first_imgNothing is a constant in scientific theories.  Popular ideas often wind up historical anecdotes.  What will happen to these two popular concepts?Snowball Earth Melts:  The idea that prior to the emergence of complex life the Earth was frozen over has been given the colorful title, “Snowball Earth.”  Scientists at Imperial College, London, are questioning whether this ever happened, according to EurekAlert.  They claim to have found evidence of repeated hot and cold cycles that would not have allowed Earth to undergo a prolonged period of freezing.  They also questioned it on thermodynamic grounds: “In fact, once fully frozen, it is difficult to create the right conditions to cause a thaw, since much of the incoming solar radiation would be reflected back by the snow and ice.” Antarctic rivers drain Antarctic lakes:  Many scientists had speculated that lakes under Antarctic ice might hold pristine clues to the early Earth, and exotic forms of life.  Now they may have to take into account a paper in Science1 that found evidence these lakes are connected and drain from one to another as the ice cover shifts.  Images from space show that these lakes act like lubricants and rapidly shift the highly-pressurized subglacial ice around.  They cited instances: “Large outbursts of subglacial water have been observed in coastal regions,” and “Antarctic subglacial water can move in large volumes between lakes, on short time scales and over long distances.”    In conclusion, they remark that the water movements they detected are “large, extensive, and temporally variable.”  Big changes were seen within just 2-3 years.  “These observations provide clues to understanding the stability of ice streams through their sensitivity to basal lubrication,” they said.  “The time scale for subglacial water transport (months to years) is short compared with that of other known drivers of glacial flow variability, suggesting a mechanism for more rapid changes in ice stream behavior than have previously been assumed.”It may be a hard sell, therefore, to claim that anything under the Antarctic remained stable for millions of years – or that we can know with any certainty what the Earth looked like before there were observers.1Fricker, Scambos, Bindschadler and Padman, “An Active Subglacial Water System in West Antarctica Mapped from Space,” Science, 16 March 2007: Vol. 315. no. 5818, pp. 1544-1548, DOI: 10.1126/science.1136897.Didn’t they ever hear of global warming?  Indeed, the science wars are heating up all over the world.(Visited 6 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

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Mozilla Ups Security Bug Bounty to $3,000

first_imgRelated Posts Top Reasons to Go With Managed WordPress Hosting Mozilla, the organization behind the popular Firefox browser, just announced a major refresh of its security bounty program. When Mozilla instituted this program in 2004, the organization paid security researchers $500 for discovering eligible security bugs. For new bugs, Mozilla will now pay $3,000. The organization cites the fact that “the security environment has changed tremendously” as the main reason for the increase. In addition, Mozilla also clarified that the bounty program includes Firefox, as well as the Thunderbird email client and Mozilla’s mobile products like the newly released Firefox Home tool for the iPhone.To be eligible for the $3,000 reward, bugs must be original and previously unreported. The security bug must also be a remote exploit and can’t be caused by a third-party plugin or extension. Bugs can be reported confidentially through Mozilla’s bug tracking software, though Mozilla will also pay when researchers disclose security bugs publicly. The organization, however, encourages researchers to disclose these security issues privately.Only a few Mozilla products are ineligible for the bounty program. The Mozilla Suite, an all-in-one Internet application suite that resembles the old Netscape Communicator product, isn’t eligible, for example, as Mozilla stopped development on this program in 2008.$1,337: What Others PayA number of other companies have established similar bounty programs. Google, for example, pays $500 for “interesting and original” security vulnerabilities in Chrome and $1,337 for severe bugs. Some researchers, however, have called Google’s $500 bounty “insulting.” When Google established this program, it cited Mozilla’s $500 bounty as the reason for choosing this price, so it will be interesting to see if Google will also bring its bug bounty up to $3,000 as well. frederic lardinois Tags:#Browsers#news#web center_img 8 Best WordPress Hosting Solutions on the Market Why Tech Companies Need Simpler Terms of Servic… A Web Developer’s New Best Friend is the AI Wai…last_img read more

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a month agoEl Hadji Diouf explains his constant criticism of Liverpool

first_imgAbout the authorPaul VegasShare the loveHave your say El Hadji Diouf explains his constant criticism of Liverpoolby Paul Vegasa month agoSend to a friendShare the loveEl Hadji Diouf stands by his criticism of former club Liverpool.The 38-year-old keeps in touch with fellow Senegalese Sadio Mane, who has netted four times already this campaign.Diouf said: “I’ve never hidden the fact that Liverpool didn’t treat me right and that they cherished some players better than me, even though I’d arrived with a better profile.“Sometimes, reporters will never get what goes on in the club and in the dressing room.“Don’t get me wrong: the club is run very well now, based on what I hear from Sadio Mane, but I feel I was seen as an outsider back then.“The upsetting thing is that Real Madrid and Barcelona had offered me more money, but I really wanted to go to Liverpool – and it ended up being one of my worst experiences.” last_img read more

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