What's more exciting than having a fresh hot pizza delivered to your door? How about having it brought to you by a robot? Thanks to Domino's Robotic Unit or DRU, that just became a reality! On March 8, the three-foot tall robot delivered its first pizza to some lucky residents in Brisbane, Australia.

    The fully autonomous DRU is the result of a cooperation between Domino's Pizza Australia and Marathon Robotics.The 450-pound machine that travels at a maximum speed of 12.4 miles an hour can traverse a distance of up to 12 miles and back, before requiring a battery recharge. LIDAR, a laser-based sensor technology similar to the one used in self-driving cars, enables DRU to detect and avoid obstacles, while traditional sensors, much like those used in vacuum robots ensure its path is safe as it heads to its destination.   

    The robot can fit up to ten pizzas and even has a separate cold area to accommodate drink orders.To access their fond, customers have to enter the unique code provided by the company.This is not only ensures that they pick up the right pizza, but also prevents the pies from getting stolen.

    Scientists expert additional DRU's to be ready for service in their various Queensland locations within the next six months. But don't expect these super cute robots to replace humans anytime soon. According to Domino's the DRU still needs extensive testing, which the company believes could take up to two years.

    And then there is also the issue of regulations.The public use of autonomous vehicles is still banned in most countries.But Don Meij, the CEO and Managing Director of Domino's Pizza Australia New Zealand Ltd, is not worried.He is “confident that one day DRU will become an   integral part of the Domino's family.”

How to Cure a Stomach Ache

    When your stomach is upset, it is difficult to concentrate or even get through your day. If you wish to cure a stomach ache and keep it from coming back, follow these steps.

    1）{#blank#}1{#/blank#}Don't start treating until you know the source of your pain. Your stomach is a big area so start by pinpointing your pain. Is there tightness in your lower abdomen or intestines? Or is there a burning high in your stomach?

    2）Stay hydrated. You need to drink water every day, no matter what. Dehydration can cause your stomach ache, tightness in your intestines and constipation. Drinking proper water each day helps your body function properly.{#blank#}2{#/blank#}

    3）Eat some crackers. Often pain in your stomach is caused by hunger or something disagreeable you have eaten. Fill the hunger with a few crackers to take the edge off. The crackers will also provide something to mix with any bacteria or other disagreeable items you may have consumed.

    4）Relax. {#blank#}3{#/blank#}Stand up to stretch, and take a walk to relax. This will also help loosen any tension your stomach is holding due to the ache you feel.

    5）Maintain a regular high-fiber diet. When your stomach aches often you need to take a look at your diet. {#blank#}4{#/blank#}If your digestive system is not working with a steady flow you will back up and feel the pain. Consuming high fiber foods will help you regulate your digestive system.

    6）Wait it out. Sometimes whatever is ailing you just needs to work its way out of your system. {#blank#}5{#/blank#}

    Today, we are constantly bombarded with media reports about research on the right diet to follow to help us maintain a healthy lifestyle or lose weight—but it's hard to know which one to pick and, once chosen, it's harder still to stick to it. And now there's another choice to get our teeth into.

    A flexitarian(弹性素食者)diet involves eating plant—based foods and only occasionally eating meat and fish. This eating style allows you to supplement some ingredients that you wouldn't get in a stricter vegan(素食主义者)diet—another trend growing in popularity. And like veganism, flexitarianism isn't about eating carefully to help you lose a few pounds—it's something people choose for ethical reasons, to help the planet. And a study into the global food system and how it affects the climate, has found that eating mainly plant-based foods is one of three key steps towards a sustainable future for all by 2050.

    This research found that food waste will need to be halved and farming practices will also have to improve to achieve this. But without a single solution, a combined approach is needed. Dr Marco Springmann from the University of Oxford was one of the lead authors of the report. He told the BBC “We really found that a combination of measures would be needed to stay within environmental limits and those include changes towards healthier more plant—based diets.”

    But whereas vegans think it's wrong for animals to be killed for food, flexitarians believe eating meat once in a while is acceptable. And Dr Springmann agrees—as long as we “treat it as a luxury, it's probably OK but you shouldn't have more than one serving of red meat, which includes beef and pork, per week.” And here's another fact to digest: If we moved to this type of diet, the study found that greenhouse gas emissions from agriculture would be cut by more than half.

    A biologist once criticized for stealing eggs from the nests of the rarest bird in the world has been awarded the "Nobel Prize" of conservation after his methods saved nine species from extinction.

Professor Carl Jones won the 2016 Indianapolis Prize — the highest accolade in the field of animal conservation — for his 40 years of work in Mauritius, where he saved an endangered kestrel from becoming the next Great Auk.

    When the 61-year-old first travelled to the east African island in the 1970s, he was told to close down a project to save the Mauritius kestrel. At the time there were just four left in the wild, making it the rarest bird on Earth. However, he stayed, using the techniques of captive breeding (人工繁殖), which involved snatching eggs from the birds' nests and hatching(孵化)them under incubators, prompting the mothers to lay another set of eggs in the wild.

    A decade later, the number of Mauritius kestrels had soared to over 300 and today there are around 400 in the wild. The biologist has also been necessary in efforts to bring other rare species back from the edge of extinction, including the pink pigeon, echo parakeet and Rodrigues warbler.

    Prof Jones was awarded the $250,000 (£172,000) prize at a ceremony in London.

"As a young man in my 20s, I certainly didn't enjoy the stress and the tension of the criticism I received," reflecting on the start of his career, he said the Maurutius kestrel project had been seen as a "dead loss" at the time. In the 1970s there was fierce opposition to the captive breeding techniques, with critics arguing that they were too risky and took the emphasis off breeding in the wild.

    Prof Jones has devoted his whole life to his work, only becoming a father for the first time eight years ago, at 53. He said receiving the prize was particularly important to him, because it proved that his work to save birds was right.

Museum Day is here for one day and one day only — so you'll need to hurry if you want to grasp the chance to get free Saturday admission to one of the hundreds of participating museums. The yearly event is hosted by Smithsonian magazine and involves museums and cultural institutions（机构）coming together to offer free admission for visitors who would otherwise have to pay for entry. 

You just need an email address to get a ticket

To get a ticket. you'll need to go to the Smithsonian magazine website and pick which museum you want to go to. You'll be able to search to see which museums near you are participating, and from there you just have to put in your email address and name. After that, you can download your ticket and head out for some fun. Each Museum Day ticket is good for two people, so if you're in a group larger than that, a few people might need to sign up. 

A lot of museums are still feeling financial stress from the pandemic

The event is happening as museums are still struggling from the hits they took during the first few years of the pandemic. The American Alliance of Museums (AAM) estimated it will take years for museums to fully recover. 

AAM president and CEO Aura Lots noted that federal relief helped remove the potential of closure that many institutions were facing, but "2021 proved to be another painful year in which operating in go me dropped further and attendance was down nearly 40% for many of our nation's museums. " But there's hope that a free day at the museums might stimulate following visits. 

Free Admission to Participating Museums FIND A MUSEUM

If you've ever seen elephant seals (象海豹) lying on a beach, you might think that they're always. sleeping. But in fact, they spend about seven months of the year in the ocean. So how do they sleep while they're in the ocean?

Even though elephant seals are large animals, they have to be careful in the ocean. Near the surface, some dangerous animals like sharks might attack(攻击)them. So elephant seals spend most of their time diving (下潜) deep underwater, looking for food.

To find out how they sleep in the deep, a scientist named Jessica Kendall-Bar created a special cap. She and her team put the caps on thirteen female young elephant seals. The caps recorded the elephant seals brain activities. They also collected information on the elephant seals' heart rates (心率), how their bodies were moving, and how deep they were.

The scientists learned that elephant seals sometimes sleep for a short time while they are diving. They only sleep for about 10 minutes at a time. As they begin to sleep, the elephant seals can control their bodies. But when they are deeply asleep, they simply begin to fall, spinning (快速旋转) in a circle "like a falling leaf". The elephant seals wake up in time to go up for more air. In shallower (较浅的) areas, the elephant seals sometimes wake upon the seafloor.

Using the information they collected from the cap-wearing elephant seals, the scientists created a computer program to study older records of elephant seal trips. The scientists found that elephant seals only sleep for about two hours a day when they're in the ocean. That means that the rest on land is very important for them. Back on land, they sleep for about 10. 8 hours a day.

The scientists hope that their work will help to protect the places where elephant seals sleep when. they're on land.