On Being has a nice little archive of rare audio clips from Albert Einstein, speaking on various subjects, including what it means to be American, E=MC^2, Gandhi, and "The common language of science."
((Photo: Einstein sitting on the front steps of his home in Princeton, wearing his fuzzy slippers. Photo courtesy of Gillett Griffin.) )
This is a letter, written by Albert Einstein, in which he explains the details of a now-famous test of the theory of relativity—an experiment that involves measuring how the Sun's gravity alters the path of starlight traveling towards Earth.
There's a couple of important things to bring up here. First, this sheet of paper is a really handy reminder to test everything—even the work of geniuses. This test had to be performed during a full solar eclipse. Besides that stipulation there was also, you know, the existence of World War I getting in the way. So while Einstein wrote this letter in 1913, nobody carried out and documented the test until 1919.
And that wasn't the end of it. This is the fun thing about science. We might think Einstein is an awfully smart guy. And we might trust the character of Sir Arthur Eddington, who performed the 1919 test. But a hypothesis and a single confirmation of that hypothesis, is not enough to prove even Einstein right. Einstein's theory of relativity rests on several different tests, each carried out by multiple teams, over many years, using increasingly accurate tools. As late as the 1960s and 1970s, this test was still being done with the understanding that Einstein's predictions hadn't yet been verified.
Also very important: Understanding what the hell Einstein's theory of relativity is all about to begin with. For a great in-a-nutshell explanation that puts Einstein into historical context while actually making sense, I recommend checking out the short videos at Einstein Light. Produced by the University of New South Wales, this site combines helpful visuals, clear explanations, and lots of links (so you can take it deeper if you want).
Tonight, at the American Museum of Natural History in New York City, Neil deGrasse Tyson hosts a roundtable debate on Einstein's Theory of Relativity, its discontents, and how likely the theory is to stand the test of time.
You're all familiar with the recent drama in this department—data from the OPERA experiment in Italy that purported to find neutrinos moving faster than the speed of light. That has since turned out to be the result of a faulty GPS system, but it's not the only challenge to Einstein, and some of those questions can't be discounted nearly as easily.
The debate—which features scientists from UCLA, CERN, Boston University, the MITRE Center, the University of Bologna, and Louisiana State University—starts at 7:30 pm Eastern. You can watch the whole thing in the live stream embedded above.
You can also participate in the debate by tweeting questions to deGrasse Tyson and the panel. You can do that by tagging your question with the hashtag #AsimovDebate.