How do we know that the universe doesn’t rotate? Why would it matter if it did? What does all this have to do with time travel?
What are blue straggler stars? How were they first discovered? What do they tell us about star clusters and the evolution of stars?
Is it possible for anything to travel faster than light? What about tachyons? How would faster-than-light travel break causality? And just what the heck is causality, anyway?
hat is the role of consciousness in quantum mechanics, if there even is one? Is there any way at all to develop a coherent view of nature based on quantum mechanics? What are the ultimate lessons that we can learn from quantum mechanics?