Online Ad Rates and Specifications

Take advantage of Natural History’s unique site for nature, science, and culture to reach 75,000 interested and involved users each month.



      Ad              Dimension          Cost

Leaderboard         728 x 90             $5CPM

Billboard               300 x 250           $5CPM            

Footer                   300 x 100           $5CPM

General Specifications

Standard formats accepted:

SWF (Flash)


Maximum file size: 80K for Flash.


For Flash banners—Embed exact URL within the Flash file. Link must be set to open a new browser window or tab. You may also include your own click-through tracking code if desired.

For GIF or JPG files—Send the graphic and exact URL for link

All ads will be pre-approved before going live on the Natural History site. Allow a minimum of two business days in production before your campaign start date.

Ad Submission

Attach ad in an e-mail with any special specifications to: Should you have any questions, please contact Charles Harris, Publisher, at or 919-933-1867.