It's not "empty space" that's expanding, it's just space.
And the space isn't coming from anywhere, it's more like it's stretching.
Kaku likes to use a balloon as an example. When you blow up a balloon even though it's getting bigger, there isn't more rubber being added to it, just the rubber that is already there is stretching.
And the space isn't coming from anywhere, it's more like it's stretching.
Kaku likes to use a balloon as an example. When you blow up a balloon even though it's getting bigger, there isn't more rubber being added to it, just the rubber that is already there is stretching.
