Re: Time travel - Speed of light
^^ Maybe
But you have to admit that he was a gifted scientist. He called his Universal constant, (that he added into his equations, cause his equations were predicting expanding universe though he though that universe is static, thus added a constant to make his equations shows a static universe) the biggest blunder of his life.
Very recently, scientists realized that they want that constant back cause universe seems to be expanding far more rapidly then it should