Who invented the electric light bulb?
What year was the first successful airplane flight made by the Wright brothers?
Who invented the first practical telephone?
Which scientist discovered the principles of gravity?
What year was the first successful heart transplant performed?
Who discovered penicillin?
What was the first artificial satellite to orbit Earth?
Who invented the steam engine?
What year was the first successful human heart transplant performed?
Who invented the World Wide Web?