Breathing room for early animals

[Auszug] THE fossil record shows a dramatic radiation in animal forms in the latest Protero-zoic and early Cambrian epochs, the so-called Cambrian Explosion. But molecular clock1'2 and developmental3 arguments instead favour much earlier splitting of invertebrate lineages. These differing resul...
Ausführliche Beschreibung

[Auszug] THE fossil record shows a dramatic radiation in animal forms in the latest Protero-zoic and early Cambrian epochs, the so-called Cambrian Explosion. But molecular clock1'2 and developmental3 arguments instead favour much earlier splitting of invertebrate lineages. These differing results ... Ausführliche Beschreibung