D.LEDs look like crystals.
第二篇
The book of life
So far, scientists have named about 1.8 million living species(物种), and thats a just a small part of what probably exists on Earth. With so many plants, animals, and other creatures coveting the planet, it can be tough to figure out what type of spider is moving up your leg or what kind of bird is flying by.
A soon-to-be-started Web site might help. An international team of researchers has announced the creation of Web-based Encyclopedia(百科全书)of life(EOL). The project aims to catalog every species on Earth in a single, easy-to-use reference guide.
To get the encyclopedia started, the creators will use information from scientific databases(数据库)that already exist. And eventually, in special sections of the site, nonscientist with specialized(专门的)knowledge will get to join in. Bird-watchers, for example, will be able to input which birds theyve seen and where. The technology for this kind of tool has only become available.
As the EOL develops, you might find it useful for school projects. The site will feature special pages for kids who are studying ecosystems (生态系统) in their neighborhoods. To make sure the encyclopedia is accurate, scientists will review much of the information added to it. People who visit the site will be able to choose to leave out pages that havent been reviewed.
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