Enlarge / Loki Patera, in the lower-center, has a central island that divides two waves of molten material. (credit: NASA/JPL/USGS ) Volcanic activity appears to be a common feature in our Solar System; we have evidence of it on three planets and two moons and hints of it elsewhere. But that doesn’t mean all volcanic activity is the same. Venus’ activity is driven by a simple version of plate tectonics. On the Moon, massive lava flows were released by large impacts, and Mars just seems to have vented heat left over from its formation. There are also hints of cryovolcanoes, which belch up ice rather than lava, on some of the bodies of the outer Solar System. But when it comes to sheer volume of activity, all of this takes a back seat to Jupiter’s moon Io. Io is partially molten due to gravitational stress from its proximity to three large moons and a massive planet. The results are active volcanoes and vast pools of molten material on the Moon’s surface. And we just got a good look inside the biggest of them. Slicing up Loki Loki Patera is the most powerful active volcano in the Solar System. It’s an enormous crater with a central island; around that island is a sea of hot material that covers more than 20,000 square kilometers. By all appearances, that hot material isn’t stable, since the entire surface seems to be reworked every few years, temporarily replaced by new hot material. Read 10 remaining paragraphs | Comments
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Watching two waves of hot lava in the Solar System’s largest volcano
Bikers interested in going green have reason to rejoice today. Harley-Davidson has already shown off its prototype Livewire electric bike, and it’s promised to offer you a real one in the next five years . Today, the motorcycle manufacturer said it has plans to make 100 new motorcycles over the next 10 years, including an entire range of electric vehicles. Vice president Bill Davidson confirmed that electric bikes are Harley-Davidson’s future to Drive magazine while in Sydney to celebrate the brand’s 100th anniversary in Australia. While an electric Harley won’t have the signature engine boom that its combustion-powered bikes have, Davidson said that the company is working on a sound that he likens to a jet engine. “It is an amazing motorcycle, ” he told Drive . “While it doesn’t have a 45-degree, pushrod twin-cylinder engine it has the performance expected from a Harley Davidson even if it won’t sound the same, ” he said. So far, we’ve only seen the one Livewire concept model with a limited top speed and range, it’s likely thHarleyely-Davidson will create both sport and cruiser-style bikes to appeal to both the speed freaks and the touring bikers. Davidson noted that as automated cars become more ubiquitous, driving enthusiasts may turn to motorcycles to get their manual fix, telling Drive , “I think the more automatic cars [happen], motorcycling will become more appealing. I see it as a huge opportunity.” Via: Autoblog Source: Drive 
President Trump on Thursday signed a long-delayed executive order on cybersecurity that “makes clear that agency heads will be held accountable for protecting their networks, and calls on government and industry to reduce the threat from automated attacks on the internet, ” reports The Washington Post. From the report: Picking up on themes advanced by the Obama administration, Trump’s order also requires agency heads to use Commerce Department guidelines to manage risk to their systems. It commissions reports to assess the country’s ability to withstand an attack on the electric grid and to spell out the strategic options for deterring adversaries in cyberspace. [Thomas Bossert, Trump’s homeland security adviser] said the order was not, however, prompted by Russia’s targeting of electoral systems last year. In fact, the order is silent on addressing the security of electoral systems or cyber-enabled operations to influence elections, which became a significant area of concern during last year’s presidential campaign. The Department of Homeland Security in January declared election systems “critical infrastructure.” The executive order also does not address offensive cyber operations, which are generally classified. This is an area in which the Trump administration is expected to be more forward-leaning than its predecessor. Nor does it spell out what type of cyberattack would constitute an “act of war” or what response the attack would invite. “We’re not going to draw a red line, ” Bossert said, adding that the White House does not “want to telegraph our punches.” The order places the defense secretary and the head of the intelligence community in charge of protecting “national security” systems that operate classified and military networks. But the secretary of homeland security will continue to be at the center of the national plan for protecting critical infrastructure, such as the electric grid and financial sector. Read more of this story at Slashdot. 