This Autonomous Hauling System, in use by the British-Australian metals and mining company Rio Tinto Iron Ore, is a series of robotic trucks that load, haul, and dump ore and waste rock at open pit mines. Imagine Google's self-driving cars, except gigantic: each 210-metric-ton truck is 27 feet wide and 51 feet long, and can carry 320 metric tons.

When it comes to working hours, less apparently is not more. Proponents of the six-hour workday will be saddened to hear that, as delightful as shorter days sound, decreasing work hours might not make anyone any happier.

While the vast majority of US Air Force pilots still control their aircraft from inside the cockpit, about 8.5 percent are drone pilots who operate their vehicles remotely. That percentage is expected to grow, but there's a problem: the Air Force can't get enough people to volunteer for the training, according to a new report written by Air Force Colonel Bradley Hoagland for the Brookings Institution think tank.

SpaceX, billionaire Elon Musk's private spaceflight company, appears to be on a hiring spree. On its careers page, the company - which currently employs more than 3,000 people - lists nearly 200 open positions. The page is up to date, SpaceX spokeswoman Hannah Post tells Popular Science.

In many respects, we view entrepreneurs as successful, self-made men and women. We value their innovation and charitable endeavors. Yet we also associate plenty of negative characteristics with entrepreneurs, stereotyping them as selfish and out to make a profit at whatever cost.

Looking for a new project for your 3-D printer? New York lawyer Martin Galese has an idea. He's turned drawings from expired patents into digital blueprints for 3D printers. That means anybody can get their very own plastic hat holder, cup for drinking without spilling in bed, or combination pen-holder-bookmark (if you still have any paper books).