How Fast Do Thoughts Travel?

You're daydreaming about Antarctica while sitting outside in the hot sun when you look up and are blinded by the sun. Your attention shifts instantaneously from Antarctica to the sun. It takes light eight and a half minutes to make that journey.
But your thoughts don't actually travel through space. Instead, they come and go inside your head. Scientists are still figuring out how it works, but it's known that it depends on brain cells named neurons. They interact by sending electric pulses down their branching dendrites and axons.
Your thoughts travel up to 500 miles an hour, which is fast for a living system, but very slow compared to light.