But planetologists have discovered that Earth's very presence in this Goldilocks zone is itself due to an amazing stroke of luck. When the Solar System was still young, this zone came close to being taken over by the planet Jupiter.但行星学家发现，地球出现在这片“宜居带”本身就有惊人的运...
11inchesinwidth—slightlywiderthanabasketball—withahatch(盖子)thathadbeenmovedunnoticed.Thetwo-year-oldboyhadslippedinand wasdrowninginfourfeetofwastewaterinside theeight-feet-deeptank. Madisonsurveyedthesituation.Shewasthe onlyonewhocouldfitthroughthesmallhole. Withouthesitation,shetoldtheadults,“Lower mein”...
on. Then she realized that, as the water got colder and rougher, she was actually getting faster and warmer, and she was really enjoying it. At age 14, she broke her first endurance record. Years later, experts discovered that Lynne has a totally even layer of body fat, like a seal....
Having travelled from the outer reaches of our Solar System, this organic matter ended its journey in the oceans of primitive Earth. Now we need to know what the environmental parameters were which allowed this matter to keep reassembling until it formed living organisms.这些有机物从太阳系的外围...
During that year, the event also helped boost recycling efforts worldwide and in 1992, it paved the way for theUnited NationsEarth Summit. In 1995, former US President Bill Clinton awarded Senator Nelson the Presidential Medal of Freedom, for his role as the Earth Day founder. ...
Before this, the oldest seed to have been grown was from a 2,000-year-year-old tree in Israel. The Russian scientists believe the reason why the Siberian seeds were preserved for so long is that they were buried in permanently frozen earth, which protected the genetic information in the se...
Oceans cover about 71% of the earth’s surface, and are home to all kinds of animals and plants. Healthy oceans play a very important role in a healthy planet. 2 Overfishing (过度捕捞) has had terrible influence on many kinds of fish and other animals. Pollution has caused serious damag...
One day, when he was sailing(航行) on a boat near San Francisco, he was carried out into the sea by a strong wind. 2. Luckily(luck), he was discovered and picked up by a London-bound(开往伦敦的) ship. So he 3. landed(land) in London by accident. Alone and 4. hungry(hunger)...
For many, the fifth day of the Chinese New Year is a time to welcome the God of Wealth. According to Chinese legend, the God of Wealth comes down to Earth on this day. To welcome him, families open their doors...
(化合物) called 2-nonenal. The compound is a byproduct of other chemical breakdowns and sends out a “greasy” or “grassy” odor as the molecules (分子) exit the skin and are released into the air. Researchers dis...