The Ediacaran is the terminal period of the Neoproterozoic Era, spanning approximately 635 to 541 million years ago, immediately preceding the Cambrian Period. It is defined stratigraphically by the base of the Marinoan glacial cap carbonates and capped by the Precambrian–Cambrian boundary, often marked by the first appearance of complex trace fossils. The Ediacaran is characterized by the emergence and diversification of soft-bodied multicellular eukaryotes, including the Ediacara biota, and is associated with major shifts in ocean chemistry, redox structure, and nutrient availability that set the stage for subsequent Phanerozoic animal radiations.
Animal life is extraordinarily diverse and complex, having colonized almost all environments on Earth—from hostile hydrothermal vents in the deep sea to the skies across our continents. But the planet was not always teeming ...
Evolution
Apr 4, 2026
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Newly discovered fossils have given scientists their first real glimpse of when Earth made a crucial transition from plants and unrecognizably simple animals to the complex creatures that took over the world and would eventually ...
Evolution
Apr 4, 2026
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A newly discovered fossil site in southwest China has transformed our understanding of how complex animal life emerged on Earth, revealing that many key animal groups had already evolved before the start of the Cambrian Period. ...
Evolution
Apr 2, 2026
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Some of the most ancient fossils collected to date were traced back to the Ediacaran period. This is the time interval ranging from around 635 to 541 million years ago, shortly before the time when scientists predict that ...
Researchers studying the soft-bodied Ediacaran biotas of the world generally accept that there are three distinct assemblages. The 575–560-million-year-old (Ma) Avalon Assemblage is best known from the Ediacaran of Newfoundland, ...
Paleontology & Fossils
Feb 26, 2026
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In Earth's fossil record, soft-bodied organisms like jellyfish rarely stand the test of time. What's more, it's hard for any animal to get preserved with exceptional detail in sandstones, which are made of large grains, are ...
Paleontology & Fossils
Jan 8, 2026
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Sponges are among Earth's most ancient animals, but exactly when they evolved has long puzzled scientists. Genetic information from living sponges, as well as chemical signals from ancient rocks, suggest that sponges evolved ...
Evolution
Jan 7, 2026
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A research team from the Nanjing Institute of Geology and Paleontology of the Chinese Academy of Sciences (NIGPAS) has made progress in studying the Shibantan biota in Yichang, Hubei Province, uncovering the oldest known ...
Paleontology & Fossils
Oct 29, 2025
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Earth's Ediacaran Period, roughly 630 to 540 million years ago, has always been something of a magnetic minefield for scientists.
Earth Sciences
Oct 14, 2025
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The Cambrian Explosion is a landmark moment in the history of life on Earth when many of the major groups of animals first appear in the fossil record.
Paleontology & Fossils
Jul 10, 2025
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