In 2004 ,when my daughter Becky was ten , she and my husband ,Joe, were united in their desire for a dog . As for me , I shared none of their canine lust.

But why , they pleaded. “Because I don't have time to take care of a dog.” But we'll do it. ” Really? You're going to walk the dog? Feed the dog? Bathe the dog?” Yes, yes , and yes .”I don't believe you .” We will . We promise.

They didn't . From day two (everyone wanted to walk the cute puppy that first day ) , neither thought to walk the dog . While I was slow to accept that I would be the one to keep track of her shots , to schedule her vet appointments , to feed and clean her , Misty knew this on day one . As she looked up at the three new humans in her life (small, medium, and large) , she calculated ,”The medium one is the sucker in the pack .”

Quickly, she and I developed something very similar to a Vulcan mind meld (心灵融合) . She'd look at me with those sad brown eyes of hers , beam her need , and then wait , trusting I would understand — which , strangely , I almost always did . In no time , she became my feet as I read , and splaying across my stomach as I watched television .

Even so , part of me continued to resent walking duty .Joe and Becky had promised. Not fair , I'd balk (不心甘情愿地做) silently as she and I walked . “Not fair , ” I' d loudly remind anyone within earshot upon our return home .

       Then one day — January 1, 2007 , to be exact — my husband ‘ s doctor uttered an unthinkable word : leukemia ( 白血病) .With that , I spent eight to ten hours a day with Joe in the hospital , doing anything and everything I could to ease his discomfort. During those six months of hospitalizations, Becky, 12 at the time, adjusted to other adults being in the house when she returned from school. My work colleagues adjusted to my taking off at a moment's notice for medical emergencies. Every part of my life changed; no part of my old routine remained.

      Save one: Misty still needed walking. At the beginning, when friends offered to take her

through her paces, I declined because I knew they had their own households to deal with.

      As the months went by，I began to realize that I actually wanted to walk Misty. The walk in the morning before I headed to the hospital was a quiet, peaceful time to gather my thoughts or to just be before the day's medical drama unfolded. The evening walk was a time to shake off the day's upsets and let the worry tracks in my head go to white noise.

      When serious illness visits your household, it's , not just your daily routine and your assumptions about the future that are no longer familiar. Pretty much everyone you acts differently.

Not Misty. Take her for a walk, and she had no interest in Joe's blood counts or 'one marrow test results. On the street or in the park, she had only one thing on her mind: squirrels! She Was so joyous that even on the worst days, she could make me smile. On a daily basis she reminded me that life goes on.

      After Joe died in 2009，Misty slept on his pillow.

I'm grateful一to a point. The truth is, after years of balking, I've come to enjoy m' walks with Misty. As I watch her chase after a squirrel, throwing her whole being into the here-and-now of an exercise that has never once ended in victory, she reminds me, too, that no matter how harsh the present or unpredictable the future , there's almost always some measure of joy to be extracted from the moment.

    Food picked up just a few seconds after being dropped is less likely to contain bacteria than if it is left for longer periods of time, according to the findings of research carried out at Aston University's School of Life and Health Sciences. The findings suggest there may be some scientific basis of the "5-second rule" — the belief about it being fine to eat food that has only had contact with the floor for five seconds or less. Although people have long followed the ‘5-second rule', until now it was unclear whether it actually helped.

    The study, undertaken by final year Biology students and led by Anthony Hilton, Professor of Microbiology at Aston University, monitored the transfer of the common bacteria from a variety of indoor floor types as carpet, cement floor to toast, pasta, biscuit and a sticky sweet when contact was made from 3 to 30 seconds. The results showed that: time is a significant factor in the transfer of bacteria from a floor surface to a piece of food, and the type of flooring the food has been dropped on has an effect, with bacteria least likely to transfer from carpeted surfaces and most likely to transfer from cement flooring surfaces to moist foods making contact for more than 5 seconds. Professor Hilton said, "Consuming food dropped on the floor still carries an infection risk as it very much depends on which bacteria are present on the floor at the time."

    The Aston team also carried out a survey of the number of people who employ the ‘five-second rule'. The survey showed that: 87% of the people surveyed said they would eat food dropped on the floor, or already have done so. 55% of those that would, or have eaten food dropped on the floor are women. 81% of the women who would eat food from the floor would follow the ‘5-second rule'. Professor Hilton added, "Our study showed that a surprisingly large majority of people are happy to consume dropped food, with women the most likely to do so. But they are also more likely to follow the ‘5-second rule, which our research has shown to be much than an old wives' tale."

    More than 10 years ago, it was difficult to buy a tasty pineapple.The fruits that made it to the UK were green on the outside and, more often than not,hard with an unpleasant taste within.Then in 1966,the Del Monte Gold pineapple produced in Hawaii first hit our shelves.

    The new type of pineapple looked more yellowy-gold than green.It was slightly softer on the outside and had a lot of juice inside.But the most important thing about this new type of pineapple was that it was twice as sweet as the hit-and-miss pineapples we had known. In no time, the Del Monte Gold took the market by storm, rapidly becoming the world's best-selling pineapple variety, and delivering natural levels of sweetness in the mouth,up until then only found in tinned pineapple.

    In nutrition it was all good news too.This nice tasting pineapple contained four times more vitamin C than the old green variety.Nutritionists said that it was not only full of vitamins, but also good against some diseases.People were understandably eager to be able to buy this wonderful fruit.The new type of pineapple was selling fast9 and the Del Monte Gold pineapple rapidly became a fixture in the shopping basket of the healthy eater.

    Seeing the growing market for its winning pineapple, Del Monte tried to keep market to itself.But other fruit companies developed similar pineapples.Del Monte turned to law for help, but failed. Those companies argued successfully that Del Monte's attempts to keep the golden pineapple for itself were just a way to knock them out the market.

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    One day an out-of-work mime(哑剧演员)is visiting a zoo and attempts to earn some money as a performer. As soon as he starts to draw the crowd, a zoo keeper grabs him and drags him into his office. The zoo keeper explains to the mime that the zoo's most popular attraction, a gorilla, died suddenly and the keeper fears that the attendance at the zoo will fall off. He offers the mime a job to dress up as the gorilla until they can get another one. The mime accepts.

    So the next morning the mime puts on the gorilla suit and enters the cage before the crowd comes. He discovers that it's a great job. He can sleep when he wants to, play and make fun of people and he draws bigger crowds than he ever did as a mime. However, eventually the crowds get tired of him and he doesn't like just swinging on wires any longer. He begins to notice that the people are paying more attention to the lion in the cage next to his.

    Not wanting to lose the attention of his audience, he climbs to the top of his cage, crawls across a partition(隔开物), and dangles(悬荡) from the top of the lion's cage. Of course, this makes the lion furious, but the crowd loves it. At the end of the day the zoo keeper comes and gives the mime a raise for being such a good attraction. Well, this goes on for some time, the mime keeps laughing at the lion, the crowds grow larger, and his salary keeps going up.

    Then one terrible day when he is dangling over the furious lion he slips and falls. The mime is terrified. The lion gathers its strength and prepares to pounce(猛扑). The mime is so scared that he begins to run round and round in the cage with the lion close behind. Finally, the mime starts screaming and yelling, "Help me! Help me!", but the lion is quick and pounces. The mime soon finds himself lying on his back looking up at the angry lion and the lion says, "Shut up, you idiot! Do you want to get us both fired?"

    Chinese retail giant Alibaba has developed a new automated(自动化的) vehicle which is easy to mass-produce and could serve a number of functions. These could include delivery messenger or automated coffee selling machine, it said.

    The Cainiao G Plus can travel at up to nine miles per hour, reports The Verge news site. It was showed at a conference where Alibaba founder Jack Ma announced a 100bn yuan ($15.5bn) would be put into smart logistics(物流).This includes devices such as warehouse robots as well as delivery aids.

    AI expert and author Calum Chace described the G Plus as being like the "ugly big brother" of a delivery project developed by UK firm Starship Technologies. Starship has been working on this project for several years, so the Alibaba project looks to be behind as well as ugly, he said. "But that won't matter. Anything to do with artificial intelligence is put in the first place for China, which has set itself the target of overtaking the US as world leader in AI by 2030".

    China benefits from having free access to large amounts of data, essential for training algorithms(算法), he added, probably a disadvantage in Europe since the introduction of GDPR law, designed to protect privacy.

    "Don't bet against the Chinese pulling ahead in any AI-related competition, be it self-driving cars, facial recognition, or delivery projects," Mr Chace said.

    The G Plus vehicle is fitted with solid state Lidar – the laser sensors which form an important part of the system autonomous vehicles use to be aware of their surroundings.

    Solid state Lidar is cheaper and easier to produce than the traditional system, which involves spinning multiple lasers in circles to help build up a 360-degree image of what surrounds the vehicle. There are various developers creating their own versions but essentially it uses fewer lasers and a tiny swinging mirror.

    Last month BMW said that its autonomous vehicles will be fitted with solid state Lidar when they will be launched in 2021.

    A shark moving around the coastline is normally a worrying sight，but this waterborne drone (无人机) threatens floating rubbish instead of people.

    Developed by Dutch company RanMarine, the WasteShark takes nature as its inspiration with its whale shark-like mouth. Responsible for collecting waste, the drone will begin operations in Dubai Marina in November after a year of trials with local partner Ecocoast.

    According to RanMarine, the WasteShark is available in both autonomous and remote-controlled models. Measuring just over five feet by three-and-a-half feet (1.5 meters by 1.1 meter), it can carry up to 352 pounds of rubbish (159.6 kg) and has an operational battery life of 16 hours.

    By 2016 there were approximately 150 million tons of plastic in the world's oceans. One paper from December 2014 estimated that over a quarter of a million tons of ocean plastic pollution was afloat.

    "WasteShark also has the abilities to gather air and water quality data, remove chemicals out of the water such as oil, and heavy metals, and scan the seabed to read its depth and outlines," said Oliver Cunningham, one of the co-founders of RanMarine. "Fitted with a collision-avoidance system, the drone uses laser imaging detection and ranging technology to detect an object in its path and stop or back up if the object approaches."

    "Our drones are designed to move through a water system, whether it's around the perimeter (周边) or through the city itself. The drones are that last line of defense between the city and the open ocean," added Cunningham. "WasteSharks are operating in Dubai, South Africa and the Netherlands and cost $ 17, 000 for the remote-controlled model and just under $ 23, 000 for the autonomous model."

    Dubai-based operator Ecocoast has two WasteShark drones. Co-founder Dana Liparts says they will clean waterfronts for clients including hotels and environmental authorities and that Ecocoast' intention is to have the collected rubbish recycled or upcycled. However, Liparts argues that cleaning waterways doesn't have a one-size-fits-all solution and requires a combination of new technology, preventative measures and changing people's attitudes towards littering.