Today, the world's diversity (多样性) of food crops is quickly decreasing. But scientists around the world are taking action. They are building seed banks. At seed banks, scientists store the seeds of many different crops.

    There are now 1,400 seed banks around the world. However, some banks are in warm countries. If the electricity fails, the seeds will get too hot and die. Other seed banks are in countries troubled by war. Sometimes people damage the seed banks. If this happens, valuable seeds can be lost forever!

    The organization Global Crop Diversity Trust decided they wanted to deal with this problem. So, they decided to build a global seed bank. This seed bank would contain a back-up, or extra copy, of all the world's seeds. Smaller seed banks would still collect and keep local seeds. But they would also send copies of their seeds to the global bank.

    Scientists from the Global Crop Diversity Trust chose the cold, snowy mountains of Svalbard, Norway to build the global seed bank — the Svalbard Global Seed Vault (斯瓦尔巴全球种子库). Organizations, farmers, or local seed banks store their extra seeds there. And the people who place their seeds in the vault are the only people who can take them out. They pay to ship their seeds to Norway, but it does not cost them any money to store their seeds. The Global Crop Diversity Trust pays for this.

    Cary Fowler is a scientist who heads the Global Crop Diversity Trust. He said, “If the Seed Vault simply supplies seed banks with copies of seeds that those banks lost by accident, the Seed Vault will be worth more than it cost.”

    Computer programmer David Jones earns $35.000 a year designing new computer games, yet he cannot find a bank ready to let him have a credit card. Instead he has been told to wait another two years until he is 18. The 16-year-old works for a small firm in Liverpool where the problem of most young people of his age is finding a job. David's firm releases two new games for the fast growing computer market each month.

    But David's biggest headache is what to do with his money. Even though he earns a lot he cannot drive a car, take out a mortgage（抵押贷款）, or get credit cards. David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. “I got the job because the people who run the firm knew I had already written some programs”, he said. David spends some of his money on records and clothes and gives his mother 50 pounds a week. But most of his spare time is spent working.

    “Unfortunately, computing was not part of our studies at school”, he said “But I had been studying it in books and magazines for four years in my spare time. I knew what I wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway.” David added, “I would like to earn a million and I suppose early retirement is a possibility. You never know when the market might disappear.”

    Born and raised in a digital age, today's young people are generally tech savvy (技术娴熟的). But when it comes to basic life skills, they're less capable than the older generation.

    According to a recent study, 69 percent of 18 to 24-year-olds in the UK have no idea how to bleed a radiator(暖气片换水). About 35 percent of them don't know how to sew on a button, while about 11 percent don't understand how to change a light bulb or iron clothes.

    It appears young people are losing the skills older generations took for granted. In fact, the problem is shared by young people in the United States. According to a report by Forbes in 2014, most millennial (千禧一代) drivers don't know how to check their tire pressure. Cooking is another basic life skill that has been dropped, as millennials are much more likely to order food deliveries than previous generations.

    Technology may be to blame for this generational gap. Skills at using phones and computers are the ones valued these days, and the practical skills are now seen as functions that can be easily outsourced (外包). Indeed, improvements in technology have made young people unfamiliar with many basic life skills. For example, with GPS always at hand, young people have had no need to learn how to read physical maps.

    However, this change has raised concerns among many people. “If you have your master's degree and you can't live within your means or go home from your job and feed yourself a nutritious (有营养的) meal, you're not a complete graduate,” Chris Moore, a professor from Brigham Young University, US, told Huff Post.

    That's why there's an increasing call for the return of “home ec” in the US, short for home economics, which teaches basic life skills like cooking and how to do laundry. It was very popular in the early 20th century, but was later taken out of schools and universities because of budget(预算) cuts. But recently, home ec was reintroduced in a small number of schools and universities.

    “The educational system would work better if every academic class had a practical course that applied the theory to do something regular people do in real life,” Robert Frost, instructor and flight controller at NASA, wrote on Quora, according to Huff post.

     Aspirin has long been praised as a wonder drug. An aspirin a day keeps the doctor away. Many Americans have been taking one aspirin a day, believing it would protect them from a heart attack a stroke(中风), and even a cancer. But several recent studies have thrown this into question. Daily use of aspirin can have serious side effects(副作用).

    One study followed more than 19,000 healthy people aged 65 and older. They were required to take either 100 mg of aspirin (a little more than the 81 mg dose that most people take) or a placebo(无效对照剂) every day for about years, Not only did people in the aspirin group not lower their risk of heart disease, or disability but they were also more likely to suffer from bleeding into the brain or stomach. And they were more likely to die because of an increased risk of giving in to cancer, Similarly, an experiment of more than 12. 500 people aged 55 and older who have a cardiovascular (心血管的)risk found no benefit to taking aspirin daily. In study of more than 15,000 people with diabetes(糖尿病), a daily aspirin did prevent heart attacks and strokes, but it also caused serious bleeding.

    Although some earlier research has proved that aspirin can help people who have already had or are at high risk for heart attacks or strokes, the drug's value is not so clear for people, especially older people,

    The bottom line is this: Be smart and be safe. You should not take daily low-dose aspirin without talking to a doctor if you.

    ● Are over the age of 70

    ● Drink wine regularly

    ●Are on any simple medical operations

Recently, my dad and I decided to take a day trip to the Florida Keys, a coral cay archipelago located off the southernmost coast of the US. I was super excited because I had not been able to go anywhere within the past nine months because of COVID-19.

With masks and hand sanitizer, we began our fun journey before sunrise. The Keys are about two hours away from where I live in Florida, so we would get there early to see the sun coming up over the ocean. On the road, we got to enjoy the Gulf of Mexico on one side and the Atlantic Ocean on the other.

When we stopped by Curry Hammock State Park, I was really amazed. The park contains 1,000 acres of land, which protects mangroves, rock land and seagrass beds that are important to the ecosyst (生态系统) in the Keys. During our time there, we were able to see some hawks flying by, and they followed the Gulf coastline of the Caribbean, migrating (迁徙) from Canada and as far south as Peru. These hawks put their wings out, "floated" up in the wide sky and then glided for long distances. After flying for thousands of miles, they still kept their fast flight patterns.

After that, we went to Key West and visited some iconic (标志性的) stops, like Duvall Street and Mile Marker 0. It was really cool because it is the very beginning of US 1, which is the longest road that runs from Key West to the Canadian border.

It was an amazing trip to the Florida Keys, and it was thrilling to have a change of scenery.

Bergl doesn't consider himself the next Thomas Edison, He's just a man loving animals, Africa and adventure, Yet, Bergl might have invented a tool as great as the light bulb (灯泡) ―a tool that uses modern-day technology to solve an almost prehistoric (史前) problem.

The tool is called the SMART. It is designed to be waterproof (防水的) , shockproof and poacher (偷猎者) proof. Bergl worked with worldwide wildlife groups to develop it in 2011. Since then it has been seen in more than 55 countries where poachers have forced the best-known but most endangered animals to nearly die out .

SMART works as a very simple smart phone―it lets the user record what they see, like animal sightings. changes in animals and illegal activities If a park ranger (管理员) sees something that is very important, that information can be sent to the cloud (云) and sent out to the base camp so they can take action and stop the killing 

Bergl and his workmates travel to African wildlife reserves now and then They teach park rangers in some of the most remote countries how to use SMART. "SMART makes collection of information easier It allows us to pay attention to the things that really important. according to what the information is telling an,"Aid Skim Young, manager of the Etosha National park in Namibia, "thanks to SMART, most of Africa's endangered animals seem to be coming back." 

Bergl never plans to make money from his small but great invention. SMART is free and doesn't even have a patents(专利).