音频列表 1 334 Exploring With Science 1818天前 2 335 Inventions from Space Travel 2918天前 3 336 The Unsinkable TITANIC 1617天前 4 337 Aim High - Astronaut Training 3417天前 5 338 Astronauts and Cosmonauts 1617天前 6 339 Sailing the Stars 3015天前 7 340 Earth - The Inside Story 2115天...
Born Sarah Breedlove, Madam C. J. Walker was one of a few Black ladies who knew hair. It was during the 1890s that Walker started to suffer from a scalp condition that made her lose most of her gorgeous long hair. After she sought advice from others and experimented with different...
Well, SpaceShipOne is special because it is the first spaceship that wasn’t made by the government. It was built and sent up by a private US company. Lots of people want to travel in space and think that it is an enjoyable trip. But it’s too expensive. American millionaire Dennis Tit...
The official issuance of the licenses shows that China — the world’s largest mobile phone market — has entered the 5G era. Industry analysts predict that Chinese consumers will be able to use 5G smartphones at prices ranging from 2,000 yuan ($290) to 3,000 yuan next year. “Some 5G...
Taking a little from here and there, he got quite a clear idea of what the Island was really like. It was a secret place, where all the great men learn and invent together. To be able to join that select club, you had to have created great inventions. Only then could you receive ...
As he studied the sky, Galileo 5 that the planets circle around thesun. He was not the first person to believe this, but he was the first to provedetails of this fact. People of that time believed that the earth was the 6 of the universe(宇宙) and that everything in space moved ar...
foundriesto build their own industrial machinery, such assteam enginesandboilers. This meant that you didn’t have to wait a long time for your steam engine to arrive on a ship from the other side of the planet, you could instead purchase it (much more cheaply) from afoundryjust down the...
Long-distance radio transmission is an essential piece of technology for modern life. The communication system resulted from continuous development by many people, but the first workable radio apparatus was the brainchild of a single Italian, Guglielmo Marconi. He devised this wireless telegraph system...
"The 'World-System' has resulted from a combination of several original discoveries made by the inventor in the course of long continued research and experimentation. It makes possible not only the instantaneous and precise wireless transmission of any kind of signals, messages or characters, to al...
been put through, the Jewish people have always worked hard to rise above the assaults and respond with resilience. Their strength has resulted in countless innovations from the Jewish inventors, scientists, doctors and many others who did not allow the hate to stop their creativity and passions...