The conversation between human and AI assistant.
Does mass really exist or is it just a property of energy?
Wow, I didn't know that. Is there anything else you can tell me about dark matter?
Well, despite its prevalence, dark matter remains a mystery to scientists. They don't know what it's made of, and it has never been directly observed or detected. But scientists are working hard to learn more about this enigmatic substance and to understand its role in shaping our universe.