Carve out some time to learn about space-time. Young scientists use a remote learning resource to read up on the relationship between space and time. They consider the idea of relativity, see how objects with a large mass can bend space...

A website all about planetary mysteries—it's a one-stop-shop for all things, stars, planets, and space travel. Scholars read an astronomy overview to discover the page's big ideas, then choose from the plethora of resources, including...

The right to vote and freedom of expression are democratic principles that fall under the study of political science. A handout describes writing assignments that are common in political science college classes and gives tips and...

Is a person's sexual orientation determined at birth? With the informative website, scholars prepare for a debate about the topic. They learn the top pro and con arguments and read through a historical timeline of homosexuality. They...

This page provides an incredibly detailed description of Albert Einstein's Special Theory of Relativity. Definitely an excellent website with great pictures and examples!

Kids learn about the theory of relativity in the science of physics including examples, special vs. general, length contraction, and E=mc2.

Kids learn about the speed of light and time dilation in regards to the theory of relativity in the science of physics. Also how gravity can change the passage of time.

Understand what relativity is and what Albert Einstein discovered while studying it. Identify special relativity and general relativity.

This site from Stanford University is on the topic of simultaneity in relativity.

Biography of Albert Einstein (1879-1955), one of the most famous physicists of the last century, best known for his theory of relativity.

College-level physics course focusing on black holes. Course topics include general relativity, astrophysics, and elements of cosmology . Course features include selected video lectures, lecture notes, assignments, and exams.

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.

Website for the PBS series "A Science Odyssey." Numerous opportunities to explore the people and discoveries of science.

This page presents the actual text of Albert Einstein's book "Relativity: The Special and General Theory." Just click on the chapter titles to read the text.

A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.

A somewhat labored but thorough explanation of general relativity, beginning with Aristotle. Many links to the personalities connected to the article.

Five different theories on the subject of Imperialism, includes several historical figures for each theory and links for recommended readings on Imperialism.

Explore some of our most fundamental questions about space exploration with this research overview collected by scientists at the National Science Foundation. Additionally, experience deep space first-hand with telescope interactives.

In this text excerpted from Chapter 3, "Struggle for Existence," of Charles Darwin's "On the Origin of Species," Darwin draws on firsthand and historical information for his observations about evolution.

Astronomer Carl Sagan discusses the possibility of time travel in this audio-enhanced interview from the NOVAWeb site.

This site from BizEd is an introduction to the economic theories of Milton Friedman. It includes formulas, links to related topics, and links to other Friedman works and biographical information.

This collection by Walter Fendt (who also offers many applets on mathematics and astronomy) is large and comprehensive. Everything from classical mechanics to the theory of relativity and nuclear physics is covered. Numerous interactive...

Online access to portions of Einstein's original papers and manuscripts.

The original interpretation of the history of epistemology considered in light of modern evolutionary theory and cybernetics models. Despite this inclination, the author presents a fair and useful overview of that history with helpful...