Artículo:

Biogeochemistry: Early animals out in the cold

Autor:

Jochen J. Brocks

Nicholas J. Butterfield

Resumen:

The enduring controversy about the appearance of animals in the evolutionary record takes a fresh twist with an analysis of molecular fossils that places the rise of the sponge lineage before 635 million years ago

Página:

672

Sección:

News and Views

Publicación:

Nature

Volúmen:

457

Número:

7230

Fecha:

5 Febrero 2009

ISSN:

00280836

SrcID:

00280836-2009-02-05.txt