what is space time continuum > Space-time continuum is like a giant, 4-dimensional jigsaw puzzle. The four dimensions are three you can see - length, width, an

what is space time continuum > Space-time continuum is like a giant, 4-dimensional jigsaw puzzle. The four dimensions are three you can see - length, width, and height - and one you can't - time. All the pieces - like you, me, the planets, stars and galaxies - fit together in this puzzle to make up the universe. Time is like a river, always flowing and never stopping, no matter how fast or slow things travel through it. All the pieces of the puzzle - like us - move along this river, never staying in the same place. That's why we can look back into the past, and why we can talk about the future.