Also called self-driving cars, autonomous cars have been making the news recently. Chief among them are Google's self-driving cars. Google's driverless cars have traveled over 480,000 kilometers (300,000 mi) with only two accidents, both of which were caused by humans. But self-driving cars aren't new. In fact, their concepts have arguably been around since the days of Leonardo da Vinci, who invented a spring-powered cart with a programmable steering device.
Take targeted policies to cut excess urban real estate inventory
Bill Gates topped the list of the world's richest billionaires for the 17th time in 22 years, it has been revealed.
Other top ten foreign pictures were Transformers: The Last Knight, Dangal, Pirates of the Caribbean: Dead Men Tell No Tales, and Kong: Skull Island.
The University of Pittsburgh team used stem cells made from skin to make MCPs, a special kind of cell that acts as a precursor to cardiovascular tissue. They then placed these cells on a 3-D scaffold designed to support a mouse heart. Within 20 days, the new heart began beating at 40 to 50 beats per minute.
However, its alumni are the most mobile internationally, with 85 per cent of the class of 2014 having worked abroad.
今年2月的时候，玛蒂与希雅和克里斯汀?韦格(Kristen Wiig)一起担任2015格莱美音乐颁奖典礼(Grammy Awards)的表演嘉宾。当时金?卡戴珊(Kim Kardashian)和坎耶?韦斯特(Kanye West)坐在前排观看了这个表演。