Kyle Cudworth, Professor Emeritus of Astronomy and Astrophysics at the University of Chicago, explains the difference between open star clusters and globulars, which contain hundreds of thousands of stars and are more centrally concentrated than the open clusters.
Kristin Litzelman, Integrated Specialist in Human Development and Family Studies at UW-Extension, defines the work of informal caregivers, discusses why caregiving is important and shares results of her research of spousal support of cancer survivors.
Paul Mitchell, State Specialist in Cropping Systems Economics at UW-Extension, explains the economic value of cover crops and explores the economic principles that drive farmers to plant cover crops.
Laura Van Eerd, Associate Professor of Soil Fertility and Cover Crops at the University of Guelph, discusses the use of nitrogen as a nutrient source for cover crops. Van Eerd explains the nitrogen cycle and how to minimize nitrogen loss while maximizing nitrogen in the soil.
Jerry Hatfield, Laboratory Director and Plant Physiologist at the USDA Agricultural Research Service, explains why soil health is important, how soil degrades, how to enhance soil, how cover crops fit into the picture and the future demands of agriculture.
Tom Kaspar, Plant Physiologist at the USDA Agricultural Research Service, presents the nitrate levels in the Raccoon River in Des Moines, Iowa. Kaspar discusses the reasons for high levels of nitrogen in the water and suggests ways to lower the levels.
Eileen Kladivko, Professor of Agronomy at Purdue University, explains how to integrate cover crops to maintain nutrient levels from the time the crops have been harvested until the next planting season. Kladivko also discusses how cover crops protect the soil and reduce erosion by wind and water.
Christy Tremonti, Assistant Professor in the Department of Astronomy at UW-Madison, discusses where chemical elements come from and how they are distributed throughout the universe. Tremonti explains how life is influenced by common chemical elements in the universe.
Katherine Cramer, Professor in the Department of Political Science at UW-Madison, shares the results of a five-year study to determine how people around Wisconsin view Madison, its people and the university. Cramer explores an urban-rural divide and the implications in statewide politics.
David Archer, Professor of Geophysical Sciences at the University of Chicago, explains the relationship between the use of fossil fuel, the natural concentration of carbon dioxide in the atmosphere and the ability of human society to recognize and understand anthropogenically triggered climate change.