What causes the seasons?

Claud H. Sandberg Lacy, professor of physics, replies: The rotational axis of the earth is tilted by 23.5 degrees from its orbital pole. Also, the direction of the earth’s rotational axis does ...

How do you get a computer virus?

Ken Armstrong, instructor in information systems in the Sam M. Walton College of Business, replies: Several types of viruses are now prevalent in today’s online world. They include file infecto...