The nautilus is a cephalopod, like the octopus and squid. Unlike some animals in this class, it has a hard outer shell, which is divided into chambers. As the nautilus grows in size, it periodically seals off the shell behind it and creates a new, larger chamber to live in. This ongoing process creates the familiar spiral structure that is visible when a nautilus shell is sliced in half.
Talkback
More ZDNet Photo Galleries
Meet Doc
-
-
Here to help you with your Document Management Needs
- Check out Doc’s Blog on ZDNet
- Help your company, help the earth I want to share with you the Environmental Defense Fund Paper Calculator, which allows you to gauge your organization's environmental impact.
- Which is Greener: Paper or Digital? The Answer May Surprise You Anything we can do to reduce paper consumption is good. But what about the impact of digital waste?
-
Produced by
ZDNet and -
