News

All present-day life arose from a single ancestor

Protein analysis rules out multiple sources

By
2:57pm, May 12, 2010

One isn’t such a lonely number. All life on Earth shares a single common ancestor, a new statistical analysis confirms.

The idea that life-forms share a common ancestor is “a central pillar of evolutionary theory,” says Douglas Theobald, a biochemist at Brandeis University in Waltham, Mass. “But recently there has been some mumbling, especially from microbiologists, that it may not be so cut-and-dried.”

This article is available only to subscribing members. Join SSP today or Log in.

More from this issue of Science News

[title_1]