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Living fossils have hot sex
10-04-2007 · EurekAlert!University of Utah scientists discovered a strange reproductive method in primitive cycad plants: The plants heat up and emit a toxic odor to drive pollen-covered insects out of male cycad cones, and then use a milder odor to draw the bugs into female cones so the plants are pollinated. This method may represent an intermediate step in the evolution of plant pollination, the researchers report in the new issue of Science.
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- Fossil data plugs gaps in current knowledge, study shows
10-02-2007 · University of Bath
Researchers from the Department of Biology & Biochemistry have shown for the first time that fossils can be used as effectively as living species in understanding the complex branching in the evolutionary tree of life.
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- Fossil data plug gaps in current knowledge, study shows
10-02-2007 · University of Bath
Researchers from the Department of Biology & Biochemistry have shown for the first time that fossils can be used as effectively as living species in understanding the complex branching in the evolutionary tree of life.
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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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- Treasure trove of fossils found in Kendall County cave
04-12-2007 · EurekAlert!
UIC geologists discovered and excavated fossils from a cave in a Kendall County limestone quarry that has shed new light on living conditions in the area some 310 million years ago. The find includes a fossil of the oldest known conifer in North America.
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- 'Carnivorous' Coelophysis Dinosaur Fossil Re-examined -- Last Meal Was Primitive Crocodile
10-02-2006 · ScienceDaily
Four American Museum of Natural History paleontologists have overturned a 1950s claim that a theropod dinosaur called Coelophysis was a cannibal that ate juveniles of its own kind, forcing a revision of a popular story of dinosaur behavior that has been repeated many times in the scientific literature, popular media, and museum exhibits. In order to test the well-known cannibal-Coelophysis hypothesis, the team re-examined the anatomy of the two celebrated Coelophysis fossils said to exhibit cannibalism, as well as the structure of the bone found in the abdominal cavity of one of the specimens.
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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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- Despite their heft, many dinosaurs had surprisingly tiny genomes
03-07-2007 · EurekAlert!
They might be giants, but many dinosaurs apparently had genomes no larger than that of a modern hummingbird. So say scientists who've linked bone cell and genome size among living species and then used that new understanding to gauge the genome sizes of 31 species of extinct dinosaurs and birds, whose bone cells can be measured from the fossil record.
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- Fish devastated by sex-changing chemicals in municipal wastewater
02-16-2008 · EurekAlert!
While most people understand the dangers of flushing toxic chemicals into the ecosystem through municipal sewer systems, one potentially devastating threat to wild fish populations comes from an unlikely source: estrogen.After an exhaustive seven-year research effort, Canadian biologists found that miniscule amounts of estrogen present in municipal wastewater discharges can decimate wild fish populations living downstream.
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- How long is a child a child?
03-13-2007 · EurekAlert!
An international research team led by scientists from the Max Planck Institute for Evolutionary Anthropology (Leipzig, Germany) and the European Synchrotron Radiation Facility (Grenoble, France) has found evidence that some of the earliest members of our species had evolved our characteristically long developmental period, and most likely our extended childhood, over 160,000 years ago. These findings are in contrast to studies that suggest that early fossil hominins possessed short growth periods, which were more similar to chimpanzees than to living humans.
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- Fossil shows human growth at least 160,000 years ago
03-13-2007 · EurekAlert!
An international team of scientists have found that the oldest member (160,000 years old) of the genus Homo shows a modern human life history profile. These findings, based on experiments at ESRF, are in contrast to previous studies suggesting that early fossil humans possessed short growth periods, which were more similar to chimpanzees than to living humans.
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