Welcome to our course on Understanding Einstein, the Special Theory of Relativity. I am Larry Lagerstrom, I am an Academic Director and Historian of Science at Stanford University, and in this brief video clip, I want to give you three reasons why you should consider taking this course. You may know that every year Time Magazine chooses a Person of the Year. And a few years back, at the turn of the century from the 20th century into the 21st century, they decide they should choose a Person of the Century. And of all the significant figures they considered for that honor, the one they ended up choosing was Albert Einstein. And on the face of it, this is really a remarkable decision, because Einstein, he was a theoretical physicist, he dealt with very abstract, very abstruse matters. And yet, just to be in the conversation for an honor such as the Person of the Century, means that this is somebody we should really know a little bit more about, so let’s say that's our first reason, For considering taking this course, so, number one, Person of the Century, again, some day you should know something more about. Number two, we'll call this the miracle year, Of 1905. And in 1905, Einstein had maybe the greatest year any scientist has ever had. And at the time he was only 26 years old, of all things, he's a patent clerk at the Swiss patent office. He essentially was a failed academic, he graduated from university in 1900, tried to get a job as a physics assistant at a university, had failed in that. Tried to get a job teaching physics, wasn't able to find a position that, even in the high school level, and therefore eventually, he was able to find a job at the Swiss patent office. And in 1905, he published five papers, almost anyone of which could have made his career as a physicist and his name. To give you an idea, one of those five papers dealt with the quantum nature of light. Really introduced the idea that light maybe was more than just a wave, which was well accepted by that time, but that it had particle like aspects to it. So really that was the paper that kicked off what later became known as the Quantum Revolution in physics in the 20th century. So that in itself, and it was a really controversial idea at the time, and for a number of years after that as well. So that was one paper, another paper he wrote showed that there was really convincing evidence that atoms existed. And you might say, well, people thought about atoms for centuries, actually. But up until that time, even in the era of 1900 or so, it was debated whether these entities actually existed, we could never see them, probably, and therefore really even proper to talk about scientifically. And he showed, theoretically, that there was good solid evidence that atoms existed. And then, another paper was his famous equals mc squared paper, introducing probably the most famous equation in all of science, really. And, yet another paper was what later became know as the Special Theory of Relativity, and that's going to be the topic of our course. We want to figure out, what was it about Einstein that enabled him to come up with some of these ideas, and in particular the Special Theory of Relativity? He really transformed our understanding of space and time, that perhaps time isn't different for one person compared to another person, just the ticking off of clocks can change. Length, measuring lengths can be different, how can a length be one thing for one person, and yet another thing for another person? And so on, and so forth, so this miracle year of 1905, that in itself would make Einstein obviously a suitable topic for further understanding. Further delving into exactly how this occurred, and what the concepts were, and what the implications were. So, Person of the Century, miracle year of 1905, number three here, We'll just list it as a quote, as you may know, there are quotes by Einstein all over the place, all over the Internet, you see them all the time. Actually, many of them are fake quotes, Einstein didn't say what he supposedly said. Sometimes it's something he might have said, but never actually quite said it that way. But this quote I want to tell you about, is definitely something Einstein said, and he said, the important thing is not to stop questioning. The important thing is not to stop questioning, curiosity has its own reason for existing. Sizing curiosity here, curiosity has its own reason for existing. He said, one cannot help but be in awe when one contemplates the mystery of eternity, of life, of the marvelous structure of reality. The mystery, the marvelous structure of reality, and then he went on to say, it is enough if one tries to comprehend only a little of this mystery every day. The mystery, the marvelous structure of reality, it's enough just to comprehend only a little bit of this mystery everyday. If you aspire to be that sort of person, if you are that sort of person, then this is the course for you, because that's exactly what we'll be trying to do. We'll be trying to lift the veil a little bit on that marvelous structure of reality and the mystery of it. And follow in the footsteps of Einstein in these revolutionary ideas that he introduced, especially in the miracle year of 1905, and see how he came about it, learn a little bit about Einstein himself, and also exactly what are the implications of some of these ideas. So I hope you'll join us in this course.