I stole your dog today. No, I didn’t set foot in your house, but from the condition of your dog, I can imagine what it looks like... the word “rubbish” comes to mind.

I found her along a road, with a heavy chain wrapped around her neck, still attached to rotten boards from her doghouse. Not only did I know that most of the town people had already ignored her, judging by where I found her, but I knew that if she had gotten into the Woods, the “cross” that she dragged behind her would have wrapped around a tree until starvation or thirst killed her. She has a beautiful name now. Already in the first week she has come to look more like she should. Her eyes sparkle and she has learned to wag her tail in greeting. She has stopped flinching (畏缩) when I make a sudden movement, because she knows now that I won’t beat her. In fact, she rarely leaves my side. She’s even become brave enough to bark at a cat and today I watched from the window as she attempted to play with the other dogs. No, it’s clear she does not miss you or her former life on a chain.

It’s not clear yet whether shell remain here or whether I’ll find her a loving home where she can count on more individual attention than I can give her, but one thing is certain. This is one bit of stolen “property” who is never returning to you. So charge me, accuse me, plead (乞求) with the courts that she is rightfully yours... I’m convinced this is the best “crime” I’ve ever committed. Hardly anything has pleased me more than the day I stole your dog. I need only look into her beautiful brown eyes to know that shed defend my decision with her life. If we have one prayer, it is that you will not replace her, and if we have one special day to celebrate together, it is the day I stole your dog and the day she stole my heart.

Do you suppose Darwin, one of the greatest scientists of all time, really did fools’ experiments? Or did he do experiments that were so simple and basic that other people just thought they were foolish?

Sometimes, people think they already know the answer to a question or the solution (解决办法) to a problem. Sometimes, they really do know an answer or a solution, but without thinking they are important.

Charles Darwin didn’t settle for (满足于) just thinking he knew something. And, he believed all things could be important however simple they seemed to be.

Suppose you drop sheets of paper that are of exactly the same size and shape. If you drop them at the same time in the same place, they will fall in the same way. Now make one of the sheets of paper into a tight (紧的) little ball and let it drop along with the other sheets. What happens? You have done an experiment that is so simple that you might think it couldn’t be worth anything.

But this simple experiment is important. It explains part of our present-day understandings of physics and ideas that were worked out long ago by Galileo and Newton. And these understandings set aside some of ancient Greek physics.

A scientist sometimes stops to look at very simple things and to think very hard about them. Even the simplest idea, which we might think is foolish, can shake the foundations of science.

Our Planet Earth is full of life and has incredible biodiversity. Biological Diversity or Biodiversity is the base of human existence and fundamental to its well-being. Species are the building blocks of this life on Earth, and it is believed that the species that are at present globally found have continuously evolved over 65 million years since the Last Mass Extinction. However, the nature and extent of our planet’s biodiversity at all levels have not been completely evaluated yet. Thus, the exact number of species found in the world remains unknown. Over the years, with the advancement of scientific knowledge and the discovery of more new species, it has been approximated that there are, at present, 10 million to 14 million species on Earth, of which 1.2 million species have been data-based. This means that still more than 86％ of the terrestrial(陆生的) and 91％ of the marine species remain unknown.

Every year, taxonomists(分类学家)describe thousands of species, some of which are completely new to science, while in some cases, the species and subspecies are closely examined and determined whether they can be considered distinct species.

A study has revealed that over 99. 9% of all species amounting to more than 5 billion species that ever lived here, are believed to be extinct. At present, our planet houses millions of species, among which 86% live on land, 13% in the deep subsurface, and a mere 1% in the oceans. However, Biodiversity is not evenly distributed on Earth, and its number varies greatly on different continents.

The undiscovered and misidentified species slow our ability to understand patterns and changes in global biodiversity and the rate of species extinctions(灭绝). Even after several years of taxonomic studies, only 14% of terrestrial species and 9% of marine species have been officially added to the central database. Necessarily, some species will become extinct before researchers realize they ever existed.