Dr Kaku says whenever we use words like dark matter dark energy or event horizon, it mean we’re clueless. We can make the math work by adding energy or matter into a formula but we haven’t really detected anything, only an effect.
” but we haven’t really detected anything, only an effect”
We really never detect anything. We only detect the effects.
Exactly. Balancing equations. If something is missing in an equation, give it a variable name and dimensions and call it something cool like dark matter.