Without mass the universe would be asea of particles zipping around at the speed of light (the natural condition ofany massless object).It would be hard for such particles to get together.

• 如果没有物理质量的存在；整个宇宙会是一个由各种微粒组成的海洋；这些微粒会以光的速度四处飘散(这是缺乏物理质量的物质所具的自然本性).；将这些颗粒聚集起来是极其艰难的;