Smartphones, tablets and laptops make it easy for people to work on the go, but traditionally, printers have been cumbersome to move out of the office. However, the new Zuta Pocket Printer will enable people to print anywhere. The Zuta Pocket Printer was invented by Zuta Labs, based in Jerusalem. This small printer is about 10.2 cm wide and long and 7.5 cm high, and weighs about 350 grams. The company plans to ship its printers to customers in the beginning of 2017.

This printer can connect wirelessly to smart phones, tablets, laptops and PCs via Wi-Fi, and is supported by Android, iOS, OS X and Windows. A free application from the company lets you use the printer via a mobile appliance; a laptop or PC can also select the printer for use just like any other wirelessly connected printer. This printer can print one average A4 page, measuring 21 by 29.7 cm. Zuta Labs noted that its printer can print on any standard size piece of paper, and that, in principle, it could print on any surface.

The printer's, "omni-wheels" help it turn and move in any direction on a surface. Laser sensors(激光传感器) help control the movement, speed and location, according to the company.

Zuta Labs said the printer's rechargeable battery can last about l hour, on average—long enough to print about 60 pages. One ink cartridge(墨盒) can print more than 100 pages, according to the company. Currently, the appliance prints only in black, although Zuta Labs said it plans to have a full-color printer in the future.

A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. 【小题1】 Its mini wings allow it to stay in the air and perform controlled flight tasks.

“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components,” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. 【小题2】 “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.

They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of inter-dependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems.

While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, 【小题3】 “Basically it should be able to take off, land and fly around,” he said.

Wood says the design offers a new way to study flight mechanics and control at insect-scale. 【小题4】 “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,”

James T. Green thought he was having a panic attack.

He took a break from work to walk around the block during a stressful day, and noticed he felt out of breath climbing up a small hill. That wasn’t normal, Green thought. He had become a regular biker in recent months and wasn’t exactly out of shape. He sat down at his desk, and looked at the Apple Watch on his wrist. His heart rate was through the roof, and the Heart Watch app he was using to check his pulse was flashing warnings. Maybe it was something more serious, he thought.

Although he had blood clots（血栓）in his lungs a few years back, he had been taking medication, and doctors said that it was an unusual condition for someone in their mid-20s. Still, the symptoms this time were much less severe, and he was feeling stressed, so his mind didn’t automatically jump to blood clots. Green’s doctor told him it sounded like anxiety. But then he showed her his heart rate recorded by the Apple Watch.

“This is my normal heart rate,” Green told her, pointing to the graph in the app. “This is where my heart is now. There’s something wrong.”

The doctor ordered a CT scan. The blood clots in his left lung had returned. An ambulance rushed Green to the emergency room, where he was pumped full of blood thinners（血液稀释剂）. He didn’t need surgery this time, but doctors told him that if he had waited, a clot could have killed him.

Green isn’t the only person who has discovered a serious health condition after seeing heart-rate data on a smartwatch. And he won’t be the last. Currently, smartwatches from Apple and others can tell you your heart rate and track your workouts. But these companies want to go beyond the basics by developing ways to tell you when something is wrong. In fact, it’s already happening.