Thomas Edison (46)... two thousand different materials in search of a proper filament for the light (47) ... . His assistant complained. "All our work is useless." Edison replied (48) ..., "Oh we have come a long way and we have learned a lot. We know that there are two thousand elements which we cannot use to make a good light bulb." Fill in the blank for questions (47)

Named after one of her father's favorite crocodiles, Bindi Sue Irwin first appeared in front of the cameras when she was only a few weeks old. Her father, Steve Irwin, was the star of the popular natu...

Luis Lionel Andres Messi, born June 24, 1987, is an Argentina football player for F.C Barcelona. He is not very tall, mainly, due to the growing problem he had when he was younger. His eyes are brown....

Jessica Cox suffered a rare birth defect and was born without any arms. None of the parental tests her mother took showed there was anything wrong with her. Not only she was born with this rare congit...

In 1854, Louis Pasteur was appointed professor of chemistry at the University of Lille. He demonstrated that organism such as bacteria were responsible for souring wine, beer even milk. He then invent...

Albert Einstein is a famous scientist. When he was a boy he was not smart, he even failed in his study. When his teacher gave him some works or asked him about the lesson, he could not do the task or ...