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May 17, 2022 —Early animals formed complex ecological communities more than 550 million years ago, setting the evolutionary stage for the Cambrian explosion, according to a new ...
Nov. 7, 2022 —A new study by geobiologists traces the cause of the first known mass extinction of animals to decreased global oxygen availability, leading to the loss of a majority of animals present near the end ...
Jan. 12, 2021 —Remarkably well-preserved fossils are helping scientists unravel a mystery about the origins of early animals that puzzled Charles ...
Mar. 23, 2021 —Earth scientists have discovered possibly the oldest cephalopods in Earth's history. The 522 million-year-old fossils from Newfoundland (Canada) could turn out to be the first known form of ...
Aug. 6, 2021 —It was long assumed that cyanobacteria were mainly responsible for fixing nitrogen on early Earth, thus making nitrogen available to the biosphere. Researchers now show that purple sulfur bacteria ...
June 18, 2021 —Geologic activity on Earth appears to follow a 27.5-million-year cycle, giving the planet a 'pulse,' according to a new ...
May 10, 2022 —Thanks to their easily fossilized exoskeleton, trilobites largely dominate the fossil record of early complex animal life. However, trilobite appendages and the anatomy of the underside of their body ...
Nov. 9, 2020 —When and how did the first animals appear? Science has long sought an answer. Researchers have now jointly found, in Greenland, embryo-like microfossils up to 570 million years old, revealing that ...
June 27, 2023 —Scientists have been mystified as to why animals are missing in much of the fossil record. Researchers have now developed a new method to determine if animals really were absent during certain ...
Oct. 12, 2021 —Early in animal evolution, complex life was mostly limited to the sea floor. But a few organisms evolved to move through the water, giving them a big competitive advantage over those left scuttling ...
