Time

I REMEMBER READING this book about different worlds exist with different rule of time. One that catch my memory is the world where people discovered that time moves slowly the farther from the center of earth. So people build their house as high as they could. They build their shelter at the top of the mountain feeling secure that youth will stay with them longer than whoever at lower level of earth. At this point, I was thought what's so glorious about live young as long as you can when you'll get old eventually, about live as long as you can when you'll die eventually. But the idea of staying a little longer from wrinkle are kind of tempting maybe.