A theory called inflation posits that the universe we see is just a small bubble of space-time that got rapidly expanded after the Big Bang.

• 一种叫做“膨胀论”的理论提出假设：我们所看到的宇宙不过是时空中的一个小气泡，该气泡在宇宙大爆炸之后迅速膨胀开来。