Tech Roundup: rVSV-EBOV Ebola Vaccine, Wattway & More

[A recurring feature on the latest in Science & Technology.]

• The Arctic region is warming at least twice as fast as the rest of the planet, the annual Arctic Report Card for 2016 reveals; says the "average surface air temperature for the year ending September 2016 is by far the highest since 1900."
• A first edition of Sir Isaac Newton's Principia Mathematica becomes the most expensive printed scientific book ever after being sold at an auction for US$ 3.7 million.
• Researchers develop a vaccine for Ebola virus that has been found to be 100% effective in early field trials conducted in Guinea; called rVSV-EBOV, the vaccine is said to be available by 2018 post regulatory approval, according to World Health Organization.
• World's first solar road called Wattway opens in the region of Normandy, France; built at a cost of about US$ 5.2 million, the 1-kilometre-long route covered in 2,880 photovoltaic panels is set to produce 280 megawatt hours (MWh) of energy per year.
• "General and indiscriminate retention" of emails and electronic communications by governments is ruled illegal by the European Union's highest court, the European court of justice, in what's seen as a major blow to the U.K.'s recently passed Investigatory Powers Act, also called the "Snooper's Charter".
• Microsoft co-founder Bill Gates, Facebook Inc. CEO Mark Zuckerberg, Amazon CEO Jeff Bezos and Alibaba Group Holding Ltd CEO Jack Ma jointly launch billion dollar Breakthrough Energy Ventures fund in a bid to spur clean energy technology and address global climate change.
• U.S. government begins asking foreign travelers who enter the country temporarily without a visa through the Electronic System for Travel Authorization (ESTA) process to provide their social media accounts - Facebook, Instagram, YouTube, LinkedIn and even Google+ - to identify potential threats.
• The world's first mobile research centre on the floating Brunt Ice Shelf in Antarctica to be moved to a new location for the first time, due to fears it could be trapped on an iceberg, reports Dezeen.
• Popular office communication network Slack adds support for video calling.
• Online image sharing community Imgur adds chat and following features.
• Evernote updates its privacy policy to allow vetted Evernote employees to read your notes for machine learning improvement purposes; rolls back after uproar.
• Yahoo discloses new data breach of over 1 billion users dating back to August 2013; gets hit by a class-action lawsuit as Verizon mulls exit from deal.
• Online rental service AirBnb is reportedly working on an online flight booking tool to compete with Expedia, reports Bloomberg.
• Instant messaging application Viber adds capabilities to share short video messages with friends and options to integrate with third party services like GIPHY and Wikipedia. 
• Taiwanese electronics giant HTC sets "For U" event on January 12 for new product reveal.
• Cyanogen Inc. to shut down its services CyanogenMod and Cyanogen OS (a flavour of Android that runs on OnePlus devices among others) come December 31, 2016 months after major layoffs and CEO departure; CyanogenMod to be forked into a new Android project called Lineage OS.