7:28pm PDT - October 20th, 2021
RT @wonderofscience: The speed of light on a cosmic scale. Credit: @physicsJ https://t.co/ekTd5Sdamu
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RT @wonderofscience: The speed of light on a cosmic scale. Credit: @physicsJ https://t.co/ekTd5Sdamu
0 retweets 4899 likes -