1 . Ancient builders across the world created structures that are still standing today, thousands of years later. Roman builders built thick concrete sea barriers against waves. Mayan builders created great sculptures, and Chinese builders constructed walls against foreign enemies.
A growing number of scientists have been studying materials since a long time ago. They are breaking apart pieces of buildings and reading historical texts hoping to learn how they have stood for thousands of years. The research has turned up a surprising list of materials that were mixed into old buildings. They include tree bark, volcanic ash, rice and beer. These unexpected materials can have the ability to get stronger over time. Figuring out how to copy these features can have real impacts today. While some of our modern concrete has the strength to hold up very tall buildings and heavy structures, it cannot compete with the durability of these ancient materials.
Many scientists have turned to the Romans. Starting around 200 BC, the Roman Empire was building concrete structures that have stood the test of time. Even in places where seawater has been hitting structures for ages, you will find concrete basically the way it was when it was poured 2,000 years ago. They think they have found an important reason why some Roman concrete has held up structures for thousands of years. That the ancient materials have an unusual power to restore themselves and “cure” cracks when they form is the most shocking for them. Exactly how is not yet clear, but scientists are starting to find the reasons.
Today’s builders cannot just copy the ancient processes. Even though Roman concrete lasted a long time, it couldn’t hold up heavy buildings. Instead, researchers are trying to take some of the ancient materials and add them into modern mixes. People don’t need to make things last quite as long as the Romans did. If we add 50 or 100 years to concrete’s lifespan, we’ll surely require less pulling down, less maintenance and less material in the long run.
1. What were the mentioned Roman and Chinese buildings both used for?| A．Defence. | B．Travel. |
| C．Soldier training. | D．Seawater control. |
| A．Energy-efficient. | B．Long-lasting. | C．Delicate. | D．Flexible |
| A．Their large cracks. | B．Their clear concrete. |
| C．Their internal structures. | D．Their self-repairing ability. |
| A．Contradictory. | B．Expectant. | C．Doubtful. | D．Pessimistic. |
It has been reported that
The closing ceremony was held at the Chengdu Open Air Music Park. It is the first time in the world that the closing ceremony of a large international sporting event
China
3 . Competing for a Trip to Soma Bay, Egypt
Soma Bay is a perfect place for sunny relaxation. If you take a trip there, you can also take part in the competition we organize.
The Destination
Lapped by the Red Sea on three sides and with views of sandy beaches and desert mountains, Soma Bay can attract nature lovers most, Spreading across almost 2,500 acres, the Egyptian tourist attraction has an 18-hole golf course designed by Gary Player, a golfing enthusiast, as well as the largest Thalasso spa in Africa. Kiteboarding, diving and horse riding are all on offer, too.
Of Soma Bay’s five accommodation options, a five-star hotel enjoys a fantastic location on the highest point of the Soma Bay peninsula. It has a number of guest rooms and suites with private balconies, as well as four on-site restaurants, You can enjoy beach-side pizza, take afternoon tea, or stop for a drink by the 18th hole. They are all offered by the hotel.
The Prize
With the official permission of Soma Bay, the winner can enjoy a four-night stay in a classic room at the five-star hotel on a half-price basis. The prize includes return economy class flight tickets with overhead cabin luggage from the UK to Hurghada International Airport up to the value of £650 per person, with direct routes available from cities including London, Manchester and Bristol, plus return airport transfers to Soma Bay (UK transfers aren’t included).
To Enter
Answer the following question online at natgeotv,com/uk/competitions:
ON WHICH SEA IS SOMA BAY LOCATED?
Competition closes on 31 October 2023.
The winner must be a UK adult resident, aged 18 or over.
1. What does the five-star hotel offer?| A．Games on a golf course. | B．Tickets for kiteboarding. |
| C．Something to eat and drink. | D．Accommodation on the beach. |
| A．A free stay in the perfect hotel. | B．A return airport transfer to the UK. |
| C．A possible direct flight ticket from Bristol. | D．A first class flight from the UK to Hurghada |
| A．It welcomes children. | B．It covers multiple questions. |
| C．It targets at Egyptian citizens. | D．It ends on the last day of October. |
