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Ediacaran Period

rope bridge
Photo credit: Tony Webster, via Flickr (cropped).

A Bridge Too Far? In Search of Precambrian Sponges

The most celebrated Precambrian sponge may not be a sponge at all. Watch Darwinians try to coax it into spongehood. Read More ›
Kimberella
Kimberella
Masahiro miyasaka / CC Photo: Kimberella fossil, BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

Kimberella — Conflicting Evidence from Taphonomy

The fossilization of Kimberella specimens was most likely based on rapid burial with sand during storm events. Read More ›
Kimberella quadrata
Kimberella quadrata
Image: Kimberella quadrata, by MUSE / CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0).

Kimberella — A Checkered History

John Kimber collected the first fossils of this organism and died tragically at age 38 during an expedition in South Australia in 1964. Read More ›
Kimberella quadrata
Kimberella quadrata
Photo: Dorsal mold of Kimberella quadrata from the Ediacaran of Russia,
showing the cuticular dorsal shield with tubercular nodes and the tapered oral end; by Aleksey Nagovitsyn: Wikimedia, GNU FDL).

Was Kimberella a Precambrian Mollusk?

If identified as an animal, it would “predate the Cambrian explosion of bilaterian animal phyla as a kind of ‘advance guard.’” Read More ›
Cloudina

Did Cloudinids Have the Guts to Be Worms?

I promised last year to follow up on more alleged Ediacaran animals. Now is a good moment to come back to this, with a new study having just been published in the journal Nature Communications. Read More ›
Yilingia-spiciformis

Worming Evolution into the Cambrian Explosion

A new fossil worm from the closing days of the Ediacaran is being celebrated as a missing link that demonstrates a gradual Cambrian diversification, not an explosion. Read More ›
Rachel Wood
Cambrian
Photo by Rachel Wood via EurekAlert!

Cambrian Explosion Excuses: Theme and Variations

It’s circular: “Because evolution innovates things, it will innovate things if given the opportunity.” Read More ›
Hoilungia-hongkongensis

Placozoa: An Evolutionary Leftover? 

Simple, small, and worldwide in distribution, the placozoa don’t fit any clear evolutionary picture. Read More ›
Kainops_invius_lateral_and_ventral

Alleged Refutation of the Cambrian Explosion Confirms Abruptness, Vindicates Meyer 

The top-down pattern of appearance of animal phyla during the Cambrian explosion represents major conflicting evidence for Darwinian evolution. Read More ›
Kimberella_quadrata 2

Bechly: The “Explosive” Pattern in the Fossil Record, and What It Means

Unlike the more traditional evolutionary view, ID hasn’t assumed the shape of a living fossil from an antique age. Read More ›

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