Study: Scant evidence that ‘wood overuse’ at Cahokia caused local flooding, subsequent collapse
The remains of the most sophisticated prehistoric native civilization north of Mexico are preserved at Cahokia Mounds State Historic Site. (Photo: Joe Angeles / Washington University)
April 8, 2021 SHARE
Whatever ultimately caused inhabitants to abandon Cahokia, it was not because they cut down too many trees, according to new research from Washington University in St. Louis.
Archaeologists from Arts & Sciences excavated around earthen mounds and analyzed sediment cores to test a persistent theory about the collapse of Cahokia, the pre-Columbian Native American city in southwestern Illinois that was once home to more than 15,000 people.
PhD students Ben Soloway and Grant Smith chat in a quantum optics lab at the University of Chicago on April 7, 2021. E. Jason Wambsgans / Chicago Tribune
CHICAGO â The University of Chicago is launching the nationâs first quantum technology accelerator program, offering $20 million for startup companies to develop everything from unhackable internet systems and superfast computers to sensors that can detect disease on a cellular level.
Based at the universityâs Booth School of Business, Duality plans to help up to 10 quantum startups per year by providing office and lab space, access to research facilities and $50,000 in unrestricted funds. If successful, the accelerator could turn the South Side of Chicago into the Silicon Valley of quantum technology â a next-generation convergence of science and industry.
Look up at the sky right now. Chances are, you might see an airplane somewhere a Penn State faculty member had a hand in designing.
Karen Thole, distinguished professor and department head of mechanical engineering, is a leading researcher in gas turbine efficiency.
Right now, Thole leads a research lab of about 12 graduate students and four full-time staff members who study turbine heat transfer.
âWeâre looking at all kinds of ways to make sure that gas turbines are more efficient,â Thole said, âso they take less fuel and have less carbon dioxide emissions.â
According to Thole, turbines power all aircrafts â including commercial flights and military flights. Another function of gas turbines is the ability to generate electricity.
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Entry, descent, and landing technologies are critical to placing large payloads on other planets such as Mars. As a spacecraft enters an atmosphere of a planet such as Earth or Mars, collisions with the atmospheric atoms and molecules generate very high temperature in the leading edge of the entry vehicle.
To protect from the extreme heat, it is necessary to cover the vehicle with a thermal protection system, which consists of lightweight tiles that resist heat. Accurate modeling and simulation of atmospheric entry systems are critical and must continue to improve as part of the design and planning of these missions.