You can find out about anything and everything on the internet.
You can play games, find out the latest news stories or read about films, sport or your favourite popstars.
You can also search for information on anything you like using search engines. Some of the popular ones are Yahoo!, Google and Ask Jeeves for Kids.
If you want to find out more about life on Mars, you type in 'Where can I find out about life on Mars?' and Jeeves will give you a list of websites to choose from.