Ediacaran life on land

Fossils found in rocks of the Ediacaran period in Australia have been previously characterized as early marine organisms. But a report suggests that these rocks are fossilized soils. So did some of these Ediacaran organisms in fact live on land, like lichens? A palaeontologist and a geologist weigh up the evidence.

Shuhai Xiao & L. Paul Knauth
Nature 493, 28–29 (03 January 2013) doi:10.1038/nature11765nline 12 December 2012