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How do I suggest an article topic?
Click here if you have an article idea.

How do I suggest a "Question of the Day"?
Click here if you have a "Question of the Day" idea.

When can I expect to see my question or topic suggestion published on Can you e-mail me when it's up?
We appreciate and encourage our readers' article and question suggestions. In fact, our writers find most of their topic ideas from our readers. Since we receive hundreds of suggestions per week, we obviously cannot answer every single one and, unfortunately, we are unable to provide readers with the date of when we might use their idea in an article or question. Check the site often to see if your topic has been published.

I would like to write an article for Do you accept article submissions?
We are happy to discuss article ideas with authors and experts. Please click here for more information.

I love your site! Is your information available in a book or on CD?
Yes! has produced two books so far -- and How Much Does the Earth Weigh? -- click here to place your order or to get more information. And we also now have our site contents on CD! Click here to order the CD 2001 or to find out more!

What is the best search engine to use? (A lot of junk is returned on most search engines when I am researching a topic.)
Click here to try the new search engine. It searches only hand-picked science and technology sites.

I am a student and would like to use one of your articles in my research project. Can I have your permission to do so?
We are glad to grant permission to use our material for noncommercial, nonprofit, educational purposes. We ask that you not alter the images or content from the way they appear on our site, and that you cite as your source. Click here to find out more about citing

Can you provide me with the date an article was written to use in my project bibliography?
You may cite a article in the following fashion:

"Title of Article", (, by Article Author., Inc., 2002.
Including just a year usually suffices for most bibliographies. Feel free to use the current year since we continually update our articles. Click here to find out more about citing

I would like to use your graphics or animations in my school presentation. Is there a way I copy them from your site? If not, can you send me the files I need?
The animations on are Flash files which cannot be copied the way .gif and .jpg images can. Due to overwhelming requests for animations and the time constraints of our Graphics Department, we are currently unable to send our readers our Flash files. If you are interested in requesting permission to use one of our other graphics, please click here.

I would like to use your content for business purposes. Can I have your permission to do so?
If you are not a student, teacher or educational facility, please e-mail our Business Department to discuss the use of content.

Can I use your content on my Web site if I give full credit to
No, the content on is copyright protected. Unauthorized use of content and images is prohibited and punishable by law.

Can I put a link to on my Web site?
Yes, and thank you for linking to the Web site. Click here to copy a logo banner or button for use on your site.

Why are your contests not open to international readers?
We are unable to open our contests to readers outside of the United States for legal reasons. Read Question 541 for more information on this topic.

Non-English speakers would also love your material. Are you planning to publish in other languages?
We receive quite a few requests from our international readers asking us to translate site contents into languages other than English. Because of this, our business team is currently considering options.

What is this "Express" thing?
" Express" comes from the editorial staff at It is an acclaimed new magazine for 4th- through 8th-grade students, as well as their teachers and parents. Click here to subscribe. Click here to see the Express site.

Is Marshall Brain your real name?
Yes, Marshall Brain, our founder and CEO, is a live human being and his name was given to him at birth. Click here to learn more about Marshall and the beginnings of

How do I contact someone at
Click here for more information on contacting

I'm getting pop-up ads every time I click on a page! How do I make it stop?
There are two possible pop-ups on the site: One is an actual "ad," while the other is a window that pops up to help visitors who are new to The reason you are getting both pop-ups is because your browser is set to disable cookies. (The only way the server knows if you've seen the ad before or visited the site before is if it detects a cookie on your machine.) If you set your browser to enable cookies, you will only see the pop-up ad once per visit, and you will only see the "new visitor" pop-up once ever. (To learn about cookies and why they're safe, see How Cookies Work.)

To enable cookies in Internet Explorer:

  1. Click on "Tools" in the tool bar. Select "Internet Options."
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  3. Scroll down to "Cookies."
  4. Under "Allow cookies that are stored on your computer," select "Enable."
  5. Under "Allow per-session cookies," select "Enable."
  6. Click "OK."
To enable cookies in Netscape:
  1. Click on "Edit" in the tool bar. Select "Preferences."
  2. Click on "Advanced" in the category column.
  3. Under "Cookies," select "Accept all cookies."
  4. Click "OK."