If multiple universes exist, they may collide with each other and leave behind signs in the cosmic microwave background radiation, researchers say.

研究人员说，如果存在着多重宇宙，它们可能会相互碰撞，并在宇宙微波背景的辐射里留下痕迹。

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The theory of the big bang gained widespread support in the scientific community after Arno Penzias and Robert Wilson discovered cosmic microwave background radiation in 1965.

阿尔诺·彭齐亚斯和罗伯特·威尔逊在1965年发现了宇宙微波背景辐射，这使得大爆炸理论在科学界获得了广泛支持。

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Background cosmic radiation levels in free space are ten times greater than the maximum acceptable levels for individuals who work in radiation environments on Earth.

太空环境下的宇宙射线辐射强度，超过地球上人体承受极限的十倍以上。

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They have produced highly accurate maps of the Cosmic Microwave Background (CMB) radiation, which has its origins in the very early stages of the Universe.

BBC: Pictures of the early Universe