New and Ancient Trace Makers
Trace fossils that are older than known animal fossils may have been formed by large unicellular organisms such as amoebas.
| Main Authors: | , |
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| Format: | Journal Article |
| Published: |
The American Association for the Advancement of Science
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/24668 |