Blooming prickly pear cactus (Opuntia) from the Sonora desert
Cacti are often overlooked as flowering plants. In fact, cacti bloom with colorful flowers and reproduce like all other angiosperms.
Birds' beaks: a special adaptation
The size and shape of a bird's beak is telling of its diet. Bird's beaks are special adaptations to get food and vary according to if the bird eats plants, animals, or seeds.
Most birds make homes called nests. They are built out of twigs, hair, bits of trash, mud, and many other items. Many birds build these nests in tree branches, but they can also be built on the ground or on buildings such as rooftops.
Bee on flower
Bees visit flowering plants to collect nectar so they can store it as honey back at their hives. As a bee visits one flower after another, pollen collects on its entire body and especially on the legs. Bees help pollinate flowers while they collect nectar. This is a mutualistic behavior.
Basic Needs: U.S. currency
Humans need to feel financially safe and stable.
Human arm muscles are connected to the bones by things called tendons. Tendons are rope-like fibers that join muscles to bones and allow movement.
Gravitropism is the turning or growing in a different direction of a plant in response to gravity. This plant's shoots grow upward and exhibit negative gravitropism because they are growing away from gravity's pull.
Apple Screen 1
The apple has just fallen from the tree and rests on the ground.
A 3-Dimensional Model of the Magnetosphere (WMS)
The earths magnetosphere protects the earth from high-energy charged particles coming from the sun. Some charged particles are deflected by the magnetosphere, while others become trapped and produce the aurora. This presentation shows a 3-dimensional model of the magnetosphere. The features that it highlights are flat ribbons representing the paths of charged particles deflected by the magnetosphere, triangular ribbons representing magnetic field lines, and colored surfaces representing constant
Pearl River, China (with window)
Zoom down to land reclamation from the river delta. Dissolve between data collected in 1988, 1992, and 1995.
SeaWiFS Biosphere: Pacific Ocean
Viewing the Pacific Ocean (data begins at Sept. 97 to June 99)
Progression of Hurricane Jeanne, 2004 (WMS)
Hurricane Jeanne was the fourth hurricane to hit Florida during the 2004 hurricane season. This set of images shows the progression of the hurricane as it approached Florida from the Atlantic Ocean and the Caribbean Sea. When it hit the Florida coast on September 26, Jeanne was a Category 3 storm with sustained winds near 115 miles per hour.
Selected Topics in Architecture: Architecture from 1750 to the Present, Fall 2004
General study of modern architecture as a response to important technological, cultural, environmental, aesthetic, and theoretical challenges after the European Enlightenment. Focus on the theoretical, historiographic, and design approaches to architectural problems encountered in the age of industrial and post-industrial expansion across the globe, with specific attention to the dominance of European modernism in setting the agenda for the discourse of a global modernity at large. Explores mode
Principles of Industrial Hygiene
Principles of Industrial Hygiene provides an introduction to the field of industrial hygiene and to occupational health in general. The instructor focuses on introducing concepts, terminology, and methodology in the practice of industrial hygiene and identifies resource materials. The class would benefit those wishing to pursue a Master's degree in industrial hygiene, those wishing to complete a certificate in occupational health, or for students in allied health fields needing a basic understan
Global Tobacco Control
Provides an introduction to global tobacco control. Presents the health and economic burden of tobacco use worldwide and highlights practical approaches to tobacco prevention, control, surveillance, and evaluation. Examines transnational tobacco control issues, including the following: the interpretation and packaging of epidemiologic evidence for policy makers, the determinants of tobacco addiction, the economics of global tobacco control, tobacco industry strategies, legal foundations for regu
Statistical Reasoning II
Statistical Reasoning in Public Health II provides an introduction to selected important topics in biostatistical concepts and reasoning through lectures, exercises, and bulletin board discussions. The course builds on the material in Statistical Reasoning in Public Health I , extending the statistical procedures discussed in that course to the multivariate realm, via multiple regression methods. New topics, such as methods for clinical diagnostic testing, and univariate, bivariate, and multivar
Statistical Reasoning I
Statistical Reasoning in Public Health provides an introduction to selected important topics in biostatistical concepts and reasoning through lectures, exercises, and bulletin board discussions. It represents an introduction to the field and provides a survey of data and data types. Specific topics include tools for describing central tendency and variability in data; methods for performing inference on population means and proportions via sample data; statistical hypothesis testing and its appl
Offshore Hydromechanics includes the following modules: 1. Hydrostatics, static floating stability, constant 2-D potential flow of ideal fluids, and flows in real fluids. Introduction to resistance and propulsion of ships. Review of linear regular and irregular wave theory. 2. Analytical and numerical means to determine the flow around, forces on, and motions of floating bodies in waves. 3. Higher order potential theory and inclusion of non-linear effects in ship motions. Applications to motio
Introduction to Economics
Introduction to Economics is designed to build an understanding of economic institutions, history, and principles. In addition, it will focus on relationship between private and public sectors of the U.S. economy. Also, it will analyze major economic institutions, such as property rights, markets, business organizations, labor unions, money and banking, trade, and taxation.
Carter Opens Poland Press Conference
On December 30, 1977, at a stop along his seven-nation tour of Europe, the Middle East and India, President Jimmy Carter spoke at a news conference in Warsaw. The conference, carried live on U.S. television and aired later in Poland, was the first ever conducted by an American president. (2:21)