Head bowed, I stared at the sand beneath my feet as I walked along the park's shore. Almost instantly, the waves would roll by in their continuous cycle and wash away my footsteps, any evidence that I was ever there. Instantaneously, I realized then that the same would eventually happen with everything I knew. Everything we know is merely a minute snippet of history. Evidence of us ever existing would eventually be washed away as well. In the case of my footsteps, it would only take a few seconds. As for how long it will take for evidence of us, only time will tell.