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73-96 of 12,857 results for discipline "Science and Technology"

This video segment points out that we are consuming fossil fuels at a rate far faster than they can be produced in the... see more

Carbon is the basis of all organic molecules. It is also one of the most abundant elements in the universe. This video... see more

This radio broadcast reviews the evolution of metals since the discovery of copper in ancient times, and looks at how... see more

This video segment, adapted from a NOVA broadcast, explores the possibility that extraterrestrial life might exist, and... see more

Most planetary scientists expected that lunar samples brought to back to Earth by the six Apollo missions would confirm... see more

Scientists have been looking for extra-solar planets for decades, but only recently, with better equipment and improved... see more

The Sun appears to shine at a constant rate. However, its magnetic field is actually constantly changing, and this... see more

During the first of two landings in the Mars Exploration Rover mission, scientists and engineers were full of... see more

Since its launch in 1990, the Hubble Space Telescope has provided scientists with a vast amount of quality data and has... see more

In this video segment, Dr. Ayanna Howard, a robotics engineer at NASA's Jet Propulsion Laboratory, describes the process... see more

All the stars in the universe, including the Sun, are nuclear furnaces fueled by fusion. Beginning with the fusion of... see more

This radio broadcast discusses the prospects for a Theory of Everything, why we need one, how we might achieve one, and... see more

Although the airless Moon experiences no weather analogous to terrestrial weather, conditions there are nothing short of... see more

Solar eclipses result from the alignment of the Sun, Moon, and Earth. Total solar eclipses, in which the Sun is... see more

The Sun produces 'solar wind', a continuous flow of charged particles that can affect us on Earth. It may also release... see more

People have long wondered about the existence of worlds outside of our solar system. Since 1995, significant progress has... see more

Before the 17th century, people generally believed that Earth was at the center of the universe, a system originally... see more

Galileo pioneered astronomy as the first person to study the celestial objects through a telescope. His observations,... see more

Galileo used thought experiments to test many assumptions, including the notion that heavy objects fall more quickly than... see more

In July 1991, the alignment of the Sun, Moon, and Earth produced a total solar eclipse with a particularly long duration... see more

Galileo used his telescope to gather data about the heavens, and his observations and theories sparked much controversy.... see more

On the border between Poland and Belarus, surrounding the village of Bialowieza, sits the last remaining pristine... see more

Fueled by economic pressure to maximize crop yields and government incentives to produce only one type of crop,... see more

This YouTube video, created by�Southwest Center for Microsystems Education (SCME), provides an introduction to... see more