Einstein's general theory of relativity is the subject of this interactive OLogy card. Turn it over to find fast facts, questions and answers, and other bite-size pieces of information about the theory.

See how a Geiger counter operates in this simulation. You can experiment with variables like distance to see what effect it has on the Geiger readings. If you want to probe the topic in more detail and earn "Einstein bucks", there are...

Einstein called Galileo the "father of modern physics." This media-rich essay from the NOVA Web site looks at Galileo's quest to understand the mathematics of motion.

A fantastic resource where you can find biographies of historical figures. You can search by the person's name or by topics, such as Presidents, United States Leaders, Scientists, Inventors, Humanitarians, Explorers and Pioneers,...

Learn about the discovery of gravitational waves made from two black holes colliding over a billion years ago!

This site provides a list of people who have given their lives to studying space science. Each person has a biography that you can read.

StarChild presents biographies of people who have contributed to space exploration from Tycho Brahe to Sally Ride.

This site from the Nobel e-Museum contains an informative autobiography of Carl E. Wieman, with a particular emphasis on his scientific achievements.

From The Mad Scientist Network web site. Using a question and answer format, this page discusses three types of nuclear reactions - spontaneous decay reactions, nuclear fision reactions, and nuclear fusion reactions. Each reaction type...

A clear (as these things go) presentation of the calculation of relativistic momentum. Given with a handy calculator that even calculates the % error. The site goes on to Momentum of a Photon, and to Relativistic Energy in Terms of...

A mathematically understandable presentation of relativistic energy. Parts include Relativistic Energy, Rest Mass Energy, Conservation of Energy, Pair Production, Relativistic Kinetic Energy, and even Kinetic Energy. A couple of...

This site from ScienceWorld gives a brief description of Brownian motion. It also goes on with a detailed series of formula derivations utilizing calculus. Links to related topics and definitions are given.

This site from Mathworld.com provides a detailed overview of vectors in algebra, and includes numerous formulas and examples.

Watch as physicist, Patricia Burchat, discusses two basic ingredients of our universe, dark matter and dark energy, and the effects they have in the expanding universe. [17:09]

A thorough, multipage discussion of color and color television sets that explains how an image is formed on the television using red, green, and blue light. Understandable discussion, excellent graphics, and many interactive Java applets.

Wikipedia offers several paragraphs of detailed information on absolute zero, the lowest temperature that can be obtained in any macroscopic system.

This 3 hour minseries on String Theory is divided up into 24 sections. Each is accompanied by a brief explanation and only lasts about 7 minutes. This series is perfect for any one looking to get a better grasp on this thrilling concept.

Using a question and answer format, this page discusses the question: "Is the Speed of Light Constant?" Discusses some of the history and experiments performed with light and the conclusions drawn from those findings.

Born in Palo Alto, California, and raised in Cambridge, Massachusetts - homes to Stanford and the Massachusetts Institute of Technology, respectively - you could say Eric Cornell was destined to become a renowned scientist. And while he...

Using graphics, words and numbers, the photoelectric effect is described and explained. Planck's theory about quanta of light is explained. Photon energies for the various regions of the EM spectrum are listed. An interactive JavaScript...

Have you ever wondered what would happen if you converted the mass of a paper clip into an amount of energy? In this informative quiz, discover the answer, and explore other examples of mass-energy equivalence.

This site from the University of Maryland provides part of an anecdotal history of optics and the study of light. Extremely thorough treatment of how scientists came to believe in the wave nature of light, the idea of an electromagnetic...

Part of an anecdotal history of optics and the study of light. Extremely thorough treatment of how scientists came to believe in the wave nature of light. Includes a short biographical sketch and discusses the work of Thomas Young...

A lengthy listing of values for specific heats and molar heat capacities for a variety of substances at 20 C. An explanation is given for why molar heat capacities for metals are nearly the same.