To set one of these images as your desktop background, follow these instructions:
- Click on the link for the appropriate resolution. (If you are unsure of your resolution, try 800x600.)
- A browser window should pop up, containing the wallpaper image. (If your browser blocks pop-up windows, you may need to follow instructions for allowing this pop-up window.)
- Windows: Right-click on the wallpaper image. Select "Set as Desktop Background" from the menu.
- Macintosh: Drag the wallpaper image to your desktop. From the Apple menu, select "Control Panels". Select "Appearance". Click the Desktop tab and drag the wallpaper image onto the sample screen. Click "Set Desktop".
- The image should now appear as your desktop background.
 | Museum and Dig Sites | |
 | Tyrannosaurus rex, the "king of tyrant reptiles" | |
 | Archaeopteryx lithographica, the earliest bird | |
![1280×1024](javascript:popupImage("/image/managed/8.jpg","Museum and Dig Sites",1280,1024)){kind=link}
![1024×768](javascript:popupImage("/image/managed/9.jpg","Museum and Dig Sites",1024,768)){kind=link}
![800×600](javascript:popupImage("/image/managed/10.jpg","Museum and Dig Sites",800,600)){kind=link}
![1280×1024](javascript:popupImage("/image/managed/22.jpg","Tyrannosaurus rex, the \"king of tyrant reptiles\"",1280,1024)){kind=link}
![1024×768](javascript:popupImage("/image/managed/23.jpg","Tyrannosaurus rex, the \"king of tyrant reptiles\"",1024,768)){kind=link}
![800×600](javascript:popupImage("/image/managed/24.jpg","Tyrannosaurus rex, the \"king of tyrant reptiles\"",800,600)){kind=link}
![1280×1024](javascript:popupImage("/image/managed/26.jpg","Archaeopteryx lithographica, the earliest bird",1280,1024)){kind=link}
![1024×768](javascript:popupImage("/image/managed/27.jpg","Archaeopteryx lithographica, the earliest bird",1024,768)){kind=link}
![800×600](javascript:popupImage("/image/managed/28.jpg","Archaeopteryx lithographica, the earliest bird",800,600)){kind=link}