It is now more than a century since Einstein's theories of Special and General Relativity began to revolutionise our view of the universe. Beginning near the speed of light and proceeding to explorations of space-time and curved spaces, "Introducing Relativity" plots a visually accessible course thr[...]
What is time? The 5th-century philosopher St Augustine famously said that he knew what time was, so long as no one asked him. Is time a fourth dimension similar to space or does it flow in some sense? And if it flows, does it make sense to say how fast? Does the future exist? Is time travel possible[...]
Why does philosophy give some people a headache, others a real buzz, and yet others a feeling that it is subversive and dangerous? Why do a lot of people think philosophy is totally irrelevant? What is philosophy anyway? The ABCs of philosophy --easy to understand but never simplistic. Beginning wit[...]