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Embryo fossils reveal animal complexity 10 million years before Cambrian Explosion
10-12-2006 · EurekAlert!Fossilized embryos predating the Cambrian Explosion by 10 million years provide evidence that early animals had already begun to adopt some of the structures and processes seen in today's embryos, say researchers from Indiana University Bloomington and nine other institutions in this week's Science.
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Keywords: embryo, fossils, reveal, animal, complexity, million, cambrian, explosion, fossil
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- Fossils older than dinosaurs reveal pattern of early animal evolution on Earth
07-26-2007 · EurekAlert!
The abundant diversity of characteristics within species likely helped fuel the proliferation and evolution of an odd-looking creature that emerged from an unprecedented explosion of life on Earth more than 500 million years ago. University of Chicago paleontologist Mark Webster reports this finding in the July 27 issue of the journal Science.
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- Possible evidence of cell division, differentiation found in oldest known embryo fossils
10-12-2006 · EurekAlert!
A group of 15 scientists from five countries has discovered evidence of cell differentiation in fossil embryos that are more than 550 million years old. They also report what appear to be cells about to divide. The discovery will be reported in the Oct. 13 issue of Science, in the article, "Cellular and Subcellular Structure of Neoproterozoic Animal Embryos."
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- 2 explosive evolutionary events shaped early history of multicellular life
01-03-2008 · EurekAlert!
Scientists have known for some time that most major groups of complex animals appeared in the fossils record during the Cambrian Explosion, a seemingly rapid evolutionary event that occurred 542 million years ago. Now Virginia Tech paleontologists, using rigorous analytical methods, have identified another explosive evolutionary event that occurred about 33 million years earlier among macroscopic life forms unrelated to the Cambrian animals.
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- Who laid the first egg? An update
01-23-2007 · EurekAlert!
A decade ago, geobiologist Shuhai Xiao and his colleagues discovered thousands of 600-million-year-old embryo microfossils in the Doushantuo Formation, a fossil site near Weng'an, South China. In the February issue of Geology, the journal of the Geological Society of America, Xiao will report discoveries about the intermediary stage that links the embryo to the adult.
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- Giant Sauropod dinosaur found in Spain
12-21-2006 · EurekAlert!
Fossils of a giant Sauropod, found in Teruel Spain, reveal that Europe was home to giant dinosaurs in the Late Jurassic period -- about 150 million years ago. Giant dinosaurs have previously been found mainly in the New World and Africa.
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- Dental crowns reveal the diet of a species:
12-14-2006 · EurekAlert!
According to recent research, the complexity of tooth surfaces reveals the diet of a species. Scientists at the University of Helsinki's Institute of Biotechnology and Department of Geology showed that the more complex the surface of an animal's teeth, the greater the share of vegetables in its diet. For instance, the teeth of carnivores and rodents differ in almost every aspect, but if a carnivore and a rodent eat similar food, their teeth are equally complex. The results were published in Nature.
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- Dental crowns reveal the diet of a species
12-14-2006 · EurekAlert!
According to recent research, the complexity of tooth surfaces reveals the diet of a species. Scientists at the University of Helsinki's Institute of Biotechnology and Department of Geology showed that the more complex the surface of an animal's teeth, the greater the share of vegetables in its diet. For instance, the teeth of carnivores and rodents differ in almost every aspect, but if a carnivore and a rodent eat similar food, their teeth are equally complex. The results were published in Nature.
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- Fossil discovery marks earliest record of limbloss in ancient lizard
03-22-2007 · EurekAlert!
It wouldn't have been the easiest way to get around. A University of Alberta paleontologist has helped discover the existence of a 95 million-year-old snakelike marine animal, a finding that provides not only the earliest example of limbloss in lizards but the first example of limbloss in an aquatic lizard.
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- Oldest complex organic molecules found in ancient fossils
10-25-2006 · EurekAlert!
Ohio State University geologists have isolated complex organic molecules from 350-million-year-old fossil sea creatures -- the oldest such molecules yet found. The molecules may have functioned as pigments, but the study offers a much bigger finding: An entirely new way to track how species evolved.
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- Scientists find lamprey a 'living fossil'
10-25-2006 · EurekAlert!
Scientists from the University of Witwatersrand in Johannesburg, South Africa, and the University of Chicago have uncovered a remarkably well-preserved fossil lamprey from the Devonian period that reveals today's lampreys as "living fossils" since they have remained largely unaltered for 360 million years. The scientists describe the new find in the article, "A lamprey from the Devonian of South Africa," to be published in the Oct. 26, 2006, issue of Nature.
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