The African elephant, which is the largest land animal remaining on earth, is of great importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the- forest-and-savanna (大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.

    It is the elephant's great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and under-bushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

    Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

    What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

    Twelve years ago, I was a 19 -year-old guy living in the French A1ps. In February 2004, while skiing the back - country in Val d'Isere, I fell off the mountain, resulting in a right leg broken in several pieces. I was helicoptered to hospital, operated on immediately—and there started my adult life.

    Before the accident, I was on a path to what I hoped would be a career in rugby. After-wards, and participation in collision sport was gone. I found a replacement in cycling. Unfortunately, by late 2012, I tried to cycle up Mount Ventoux, but it was halfway up when the pain hit me and I gave up.

    A decision needed to be made on a next step. I had to have my lower right leg cut off. Several months later, I had my first proper weight - bearing prosthetic (假肢). I jumped on a train with my bike to Mount Ventoux. Though it certainly wasn't my quickest, I did it.

    Two weeks later, I was lucky enough to be given a running blade; I bounced on it that day and then raced my triathlon (三项全能) on the Monday. So, that was me, up and running - almost 12 years since I had last run.

    Along with my running coach, I complete a “make every kilometre count” programme of four runs per week alongside a busy cycle, swim and gym schedule. So far this year, I have raced a 10k with an unexpected personal best in January of 38:04. I have my first speed triathlon in late March before heading to North Korea to compete in the Pyongyang Marathon on 10 April.

    If my lifetime allows, I will attempt to race in every country in the world. In the meantime, I'll keep on running — and, when it hurts and I'm low on motivation, I'll remember how far I've come and how much further I've got to go.

    Ninety years ago a man named Howard Carter made a great find. But he didn't discover an unknown people group or a new plant. He found the resting place of a king.

    People had seen signs of King Tutankhamun's tomb (坟墓) but had never found it. Finally, Carter's team discovered a set of steps that led down to some underground rooms. There Carter found the king's body and many of his treasures.

    Carter recorded his first impression in his popular book, The Tomb of Tut-Ankh-Amen：

At first I could see nothing, the hot air coming from the room causing the candle light to flicker (闪烁), but later, as my eyes grew used to the light, details of the room within appeared slowly and clearly, strange animals and gold—everywhere the light of gold... I was struck speechless with amazement, and when Lord Carnarvon, unable to stand the silence any longer, asked anxiously,  “Can you see anything?” it was all I could do to get out the words, “Yes, wonderful things.”

    The discovery has made King Tutankhamun, Tut for short, one of the best-remembered kings of Egypt. Tut became king when he was only 9 years old and ruled ancient Egypt from 1332 to 1323 B.C. No one is sure why, but he died suddenly before he turned 20. Because he died so young, there wasn't time to prepare a great tomb for him. So he ended up with a smaller tomb. Its small size was actually the reason why it stayed hidden for so long. And, Tut's tomb was not like other Egyptian kings'—it was not as damaged by time or robbers as other tombs. King Tut's tomb remains the best-kept royal (皇室的) tomb ever discovered. The discovery of this little tomb has helped people learn a great deal about ancient Egypt.

    You know the feeling that you have left your phone at home and feel anxious, as if you have lost your connection to the world. “Nomophobia” (无手机恐惧症) affects teenagers and adults alike. You can even do an online test to see if you have it. Last week, researchers from Hong Kong warned that nomophobia is infecting everyone. Their study found that people who use their phones to store, share and access personal memories suffer most. When users were asked to describe how they felt about their phones, words such as “hurt” (neck pain was often reported) and “alone” predicted higher levels of nomophobia.

    “The findings of our study suggest that users regard smartphones as their extended selves and get attached to the devices,” said Dr. Kim Ki Joon. “People experience feelings of anxiety and unpleasantness when separated from their phones.” Meanwhile, an American study shows that smartphone separation can lead to an increase in heart rate and blood pressure.

    So can being without your phone really give you separation anxiety? Professor Mark Griffiths, psychologist and director of the International Gaming Research Unit at Nottingham Trent University, says it is what is on the phone that counts-the social networking that creates Fomo (fear of missing out).

    “We are talking about an internet-connected device that allows people to deal with lots of aspects of their lives,” says Griffiths. “You would have to surgically remove a phone from a teenager because their whole life is rooted in this device.”

Griffiths thinks attachment theory, where we develop emotional dependency on the phone because it holds details of our lives, is a small part of nomophobia. For “screenagers”, it is Fomo that creates the most separation anxiety. If they can't see what's happening on Snapchat or Instagram, they become panic-stricken about not knowing what's going on socially. “But they adapt very quickly if you take them on holiday and there's no internet,” says Griffiths.

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The coronavirus in China right now has really turned things upside down for a lot of people, but not even it can come between a marathon runner and his training.

Like many of his countrymen, Pan Shancu, an amateur marathon runner from Hangzhou, in the eastern Chinese province of Zhejiang, is trapped in his apartment because of the COVID-19，but he didn't let that small detail stop him from keeping in shape for his next race, whenever it may be. He has been using the small space in his apartment as a training track, jogging around two tables and the short length of a small hallway, and recently posted on social media.

"I could not bear siting around anymore," Pan wrote. "Let's run laps in the room! Yes, one lap is about eight meters (26 feet) and I ran 50 kilometers (31 miles), I did it in 4:48:44. I am sweating all over, feeling great!"

The runner, who has a marathon best of two hours and 59 minutes, also wrote that he considers his neighbors while jogging, trying to step as lightly as possible on the floor as not to disturb them. He completed 6, 250 circuits in one of his rooms in four hours, 48 minutes and 44 seconds, and his neighbors have yet to complain.

Pan Shancu's achievement spread rapidly like virus this week, with people praising his training spirit, and saying to adopting similar strategies to stay in shape.

"I start in the kitchen, go through the living room, turn into my daughter's room, the less than 20m-long racecourse has beautiful scenery and on my left, my husband's snoring is cheering me on," one commented on Pan's post. "This is a silent battle. My husband's opinion is that I have psychological issues.