Science & Technology

David Kilper/WUSTL PhotoFegley and Schaefer examine a meteorite.Using primitive meteorites called chondrites as their models, earth and planetary scientists at Washington University in St. Louis have performed outgassing calculations and shown that the early Earth’s atmosphere was a reducing one, chock full of methane, ammonia, hydrogen and water vapor. In making this discovery Bruce Fegley, Ph.D., Washington University professor of earth and planetary sciences in Arts & Sciences, and Laura Schaefer, laboratory assistant, reinvigorate one of the most famous and controversial theories on the origins of life, the 1953 Miller-Urey experiment, which yielded organic compounds necessary to evolve organisms.

Alian Wang in the laboratoryA large team of NASA scientists, led by earth and planetary scientists at Washington University in St. Louis, details the first solid set of evidence for water having existed on Mars at the Gusev crater, exploration site of the rover Spirit.

Clint’s DNA was used to sequence the chimp genome.Comparing the human genome to the chimpanzee genome has allowed scientists to identify changes in the human genetic code that were so advantageous that they rapidly became the norm throughout humanity. The areas of human DNA where these changes occurred are currently the subject of follow-up investigations to identify the potentially vital contributions they now make to human health and development.

LaRussaThe Washington University Assembly Series will have an unorthodox start to its fall schedule with a talk by Cardinals’ manager, Tony La Russa at 11 a.m. Sept. 7 in Graham Chapel. The rest of the series features speakers on a wide range of topics including politics, economics, writing, history, religion, medicine, literature, evolution, space exploration, social justice and the Holocaust.

Below is a link to the Washington University news release about the U.S. News & World Report undergraduate rankings for 2004-05: http://news-info.wustl.edu/news/page/normal/3627.html To view a full listing of U.S. News magazine, book and Web-only rankings for 2004-05, please visit the U.S. News & World Report site: http://www.usnews.com/usnews/edu/college/rankings/rankindex_brief.php

How exactly does the human brain react to a fall or an automobile accident? Researchers at Washington University are working to answer that question through a new computer model based on magnetic resonance imaging (MRI) data. Learn more in the St. Louis Post-Dispatch article.

Photo by David KilperLars Angenent (right) and Jason He examine the upflow microbial fuel cell, which can turn wastewater into electricity.The upflow microbial fuel cell is fed continually and works with chambers atop each other rather than beside each other.

David Kilper / WUSTL PhotoAngenent and He’s microbial fuel cell may be scaled up for industrial use.An environmental engineer at Washington University in St. Louis has created a device similar to a hydrogen fuel cell that uses bacteria to treat wastewater and create electricity. Lars Angenent, Ph.D., assistant professor of Chemical Engineering, and a member of the University’s Environmental Engineering Science Program, has devised a microbial fuel cell which he calls an upflow microbial fuel cell (UMFC) that is fed continually and, unlike most microbial fuel cells, works with chambers atop each other rather than beside each other.

A modification to an “ace” gene prediction program now enables scientists to predict the very beginnings of gene transcription start sites, thereby defining the first exon of the gene. The modification to the gene prediction software TWINSCAN is called N-SCAN. Michael Brent, Ph.D. professor of computer science and engineering at Washington University in St. Louis, together with Samuel S. Gross, then an undergraduate at Washington University, and Randall H. Brown, Ph.D., a research scientist, report their results in the May 2005 issue of Genome Research.

Some species still prey on humans to this day.Early man was more wary than war-like, more intelligent, agile, and cooperative than aggressive, predator or killer, and he co-evolved as the prey of many species. Moreover, in the old days, woman wore the pants in the family and men were basically expendable, not the brightest bulbs on the tree when it came to tools, and functioning best as sentinels wary of predators in edge environments between the forest and savannah. Those are the primary themes of a new book, “Man the Hunted: Primates, Predators and Human Evolution”, co-authored by Robert W. Sussman, Ph.D., professor of anthropology in Arts & Sciences.