Jayson McCarthy, 12, was born without fingers on his left hand. That didn't stop him from being able to do many tasks. But Jayson could not grasp more than one object at a time. So Jayson 's father, Paul, created a Prosthesis(假肢), using a 3D printer. Now Jayson has fingers that open and close. “It was a do－it－yourself, father－and－son adventure，” says Paul.

    When Jayson was a baby, his doctor advised his parents not to give him a prosthetic hand until he was in his early teens. “The doctor said Jayson should first learn to get full use out of the hand he was born with，” says Paul. As Jayson got older, his father looked into purchasing a prosthetic hand, which can cost as much as $30，000. Paul found a more affordable solution.

    One day, Paul discovered a video on the Internet about Robohand, a prosthesis created with a 3D printer. He downloaded the free instructions and called Robohand's creators for advice. They told him all he needed was a 3D printer—which costs around $2，000—and some materials.

    Luckily, Jayson 's school had recently purchased a 3D printer and it offered to help Paul build the hand for Jayson n. “We used a soccer shinguard(护胫), cardboard(硬纸板), and tape. They cost about $10，” says paul.

    With his new hand, Jayson can do things better. “I can help my mom more, because now I can carry two grocery bags，” he says.

    Jayson 's father has already built several hands for Jayson. Jayson helps design each one. He says there's one thing in particular that he wants to do with a future prosthesis. “The goal，” he says, “is to be able to tie my shoelaces(鞋带)．”

SM Card Cutter

Change regular SM cards to smaller SIM cards.

    Did you know you can cut a regular size phone SIM card to a smaller size SM card and it will still work?This tool will help you do it.Just stick a SIM card in it,press it down like a stapler(订书机).A perfectly shaped smaller SIM is there.I've used it many times when swapping SIMs from one phone to another.

03/7/17-Mark Frauenfelder

Profi Cheese Slicer

    Uses a thin wire to slice up to medium-hard cheeses in four inch sections.

    I may own every cheese slicer ever made.I prefer a wire type cheese cutter so I can cut slices that work well on a piece of bread and sandwich.

    This cheese slicer is great for both tasks.It even has adjustable tension on the two cutting wires.A point of information: I did break a wire cutting a very hard piece of cheese with black pepper.Good news,the wire is replaceable,and I was able to purchase new wires to fix it.Maybe best to use on softer cheeses.Lessons learned.But, highly recommended for every other use except for those extremely hard cheeses.

03/6/17-Kent Bames

Ash Bucket(桶子）

Bucket with lid keeps your fireplace(壁炉）clear of ashes.

    I purchased this ash bucket recommended by my friend and have found it invaluable.Previously I had an old bucket that got left outside and usually filled up with rain and became a mess to clean.This ash bucket has a raised bottom and thermal insulation(隔热层）to prevent any accidental hot coals in your ash to damage your floor or cause a fire.You can store this bucket indoors since the lid is nice and tight.

03/3/17-Seth Wilson

    For centuries, medical pioneers have refined a variety of methods and medicines to treat sickness, injury, and disability, enabling people to live longer and healthier lives.

    “A salamander (a small lizard-like animal) can grow back its leg. Why can't a human do the same?” asked Peruvian-born surgeon Dr. Anthony Atala in a recent interview. The question, a reference to work aiming to grow new limbs for wounded soldiers, captures the inventive spirit of regenerative medicine. This innovative field seeks to provide patients with replacement body parts.

These parts are not made of steel; they are the real things — living cells, tissue, and even organs.

    Regenerative medicine is still mostly experimental, with clinical applications limited to procedures such as growing sheets of skin on burns and wounds. One of its most significant advances took place in 1999，when a research group at North Carolina's Wake Forest Institute for Regenerative Medicine conducted a successful organ replacement with a laboratory-grown bladder. Since then, the team, led by Dr. Atala, has continued to generate a variety of other tissues and organs—from kidneys to ears.

    The field of regenerative medicine builds on work conducted in the early twentieth century with the first successful transplants of donated human soft tissue and bone. However, donor organs are not always the best option. First of all, they are in short supply, and many people die while waiting for an available organ; in the United States alone, more than 100,000 people are waiting for organ transplants. Secondly, a patient's body may ultimately reject the transplanted donor organ. An advantage of regenerative medicine is that the tissues are grown from a patient's own cells and will not be rejected by the body's immune system.

    Today, several labs are working to create bioartificial body parts. Scientists at Columbia and Yale Universities have grown a jawbone and a lung. At the University of Minnesota, Doris Taylor has created a beating bioartificial rat heart. Dr. Atala's medical team has reported long-term success with bioengineered bladders implanted into young patients with spina bifida (a birth defect that involves the incomplete development of the spinal cord). And at the University of Michigan, H. David Humes has created an artificial kidney.

    So far, the kidney procedure has only been used successfully with sheep, but there is hope that one day similar kidney will be implantable in a human patient. The continuing research of scientists such as these may eventually make donor organs unnecessary and, as a result, significantly increase individuals' chances of survival.

    Amazon.com has received a patent (专利) right to send its products to customers by drone planes. The company is the largest US-based online seller of products. It delivers those products to customers by mail and other services. Now, the company has received a patent for its planned drone delivery system.

    In March, federal officials allowed Amazon to test its drone delivery plan. But even with a patent and the ability of drones to make deliveries, it does not appear that the company will put its new delivery system in place any time soon.

    The US Patent Office published the document. It describes Amazon's plans to use GPS to deliver products to homes and to wherever people are. The drone will use a customer's mobile device—usually a smartphone—to avoid hitting people or buildings and to find a secure area to land. The company wants to deliver products within 30 minutes after people ordering them on its website.

    However, the Federal Aviation Administration (FAA) is worried about the safety. Although it allowed Amazon to test the system, the agency said the operators must be able to see the planes. That greatly limits (限制) the delivery area.

    Loretta Alkalay is a professor at the Vaughn College of Aeronautics and Technology in New York. Although Amazon is not yet offering drone delivery, Professor Alkalay says it will not be long before it does. She says there are worries that the drones will hit buildings or people, or that the products and drones will be stolen or damaged by people on purpose. But she says that is because many people believe the drones would only deliver the products to the front door of a house. "However, it is possible that homes will one day have special areas on their roofs designed to receive product deliveries," she adds.

After months of expectation and secrecy, the official mascot (吉祥物) of the 2022 Winter Olympic Games－a giant panda-inspired cartoon character－made its first public debut with cheers at Beijing's Shougang Ice Hockey Arena.

The panda is named “Bing Dwen Dwen” in Chinese. Bing means “ice” in Chinese, while Dwen Dwen suggests “health and cleverness”－characteristics also shared by pandas. Pandas are perhaps the most recognized animal species in China, organizers said.

“Pandas combine China's traditional culture and its modern appearance together with winter sports elements in a fascinating image (形象) that shows our great expectations for the Games and shows that we welcome the world,” said Beijing Mayor Chen Jining, who also serves as an executive president on the organizing committee.

“I have already seen the mascot and from what I've seen, it's a wonderful choice,” IOC President Thomas Bach said before introducing the character.” “The mascot really takes in the best elements and characteristics of China and the Chinese people. It will be a great ambassador (大使) for the country and the 24th Winter Olympics.”

The ring of light surrounding the mascot's face is suggestive of ice and snow tracks, as well as the flowing “ribbons” of the National Speed Skating Oval. The oval is one of two new competition sites in downtown Beijing expected to become a landmark of the Games, according to its chief designer Cao Xue.

The introduction of the mascots marks the key point of a journey that began in August 2018, when Beijing organizers started a global design competition for the mascots. A total of 5,816 designs were received from 35 countries, and were reviewed by Chinese and international experts in a comprehensive evaluation and selection process.

The new mascot will serve as spirited symbol of the Games that will take place in the three zones of downtown Beijing, the suburban district of Yanqing and co-host city Zhangjiakou in surrounding Hebei province.