New and Ancient Trace Makers

See allHide authors and affiliations

Science  16 Jan 2009:
Vol. 323, Issue 5912, pp. 346-347
DOI: 10.1126/science.1168794

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


Trace fossils that are older than known animal fossils may have been formed by large unicellular organisms such as amoebas.