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Machines are besting humans in more and more tasks; thanks to technology, fewer Americans make more stuff in less time. But today economists debate not whether machines are changing the workplace and making us more efficient - they certainly are - but whether the result is a net loss of jobs. The figures above may look dire. But compare the number of manufacturing jobs and total jobs in the chart below. Since 1990, the total non-farm workforce has grown 33 percent, more than accounting for the manufacturing jobs lost.

While shark attacks are very rare, reports of shark attacks are on the rise. They have more than tripled in recent decades - from a total of 157 reports worldwide between 1970 and 1979 to a combined 661 reports from 2000 to 2009, according to the Florida Program for Shark Research (FPSR), which maintains a database of known attacks dating back to the mid-1500s. It's important to note that the increase is partly the result of an improved reporting system. But research also indicates that human population growth, increased interest in aquatic recreational activities and changes in weather and water quality play a role.

the use of historical data to train the AI gives 'a leg-up to people from groups who have traditionally been successful and grants fewer opportunities to minorities and women'.