The conversation between human and AI assistant.
What evidence is there for dark matter and dark energy?
Can you give me some information about dark matter and dark energy?
Sure, dark matter and dark energy are two of the biggest mysteries in the universe. Dark matter is matter that doesn't emit, absorb, or reflect light, but scientists can observe its gravitational effects on visible matter. Dark energy, on the other hand, is a theoretical form of energy that is thought to permeate all of space and is believed to be causing the expansion of the universe to accelerate.