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When did Cyanobacteria Begin to Fix Nitrogen?

  For much of the earth history, cyanobacteria were the only source of biogenic oxygen and a major source of fixed carbon and nitrogen. However, it is still not clear when cyanobacteria began to fix nitrogen. The finding of new filamentous cyanobacterial fossil from ca. 1000–720 million-year-...
 
Nuclei and nucleoli can be preserved in embryo-like fossils from the Ediacaran Wengan Biota

  A seven-cell specimen of Tianzhushania
  Recently, Dr. YIN Zongjun from Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences and his international colleagues from University of Bristol and Swedish Museum of Natural History published a research paper on nuclei structu...
 
Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan colonization

  Paleoenvironments (glaciation, atmospheric and oceanic oxygenation) associated with the biodiversification
  The Cambrian explosion of diverse bilaterian clades is considered to have proceeded in three phases preserved in the fossil record: (1) the appearance of basal metazoan phyla in Lat...
 
Sclerite-covered taxa and early trochozoan evolution

  Reconstruction of Orthrozanclus elongata n. sp. in life
  Orthrozanclus is a shell-bearing, sclerite covered Cambrian organism of uncertain taxonomic affinity, seemingly representing an intermediate between its fellow problematica Wiwaxia and Halkieria. Attempts to group these slug-like ta...
 
New palynoflora records reveal the terrestrial ecosystem variations of the Late Triassic in southern China

  Representative fossil spores and pollen grains from the Late Triassic Xujiahe Formation in Hechuan of Sichuan Basin
  The end-Triassic mass extinction (201.36±0.17 Ma) is one of the five largest Phanerozoic extinction events, and massive biotic crises occurred in both the marine and terre...
 
Research Posits Fossil Tree Growth Method

  The evolution of trees and forests in the Middle to Late Devonian Period, 393–359 million years ago, profoundly transformed the terrestrial environment and atmosphere. The oldest fossil trees belong to the class Cladoxylopsida. In general, their water-conducting system was a ring of hundred...
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