This means if one side of the hypothetical universe-brain wanted to at least take note of its other side, that would take 90 billion years even at the speed of light. The universe, in contrast, is presently some 90 billion light years in diameter, and – as Albert Einstein taught us – nothing travels faster than the speed of light. But the brain is small and it takes only fractions of seconds for signals to zip around in it. The signals in our brain travel at about 100 meters per second, a million times slower than the speed of light. Most of these signals (80%) are short-distance, going only about 1 millimeter, but about 20% are long-distance, connecting different parts of the brain. Neurons in the human brain send about 5-50 signals per second. Another important difference is that it takes a long time for signals to cross the universe.
0 Comments
Leave a Reply. |