Grumpy Old Geeks Topics Earth’s slowing rotation Topic Earth’s slowing rotation 2 mentions in 1 episode The hosts discuss a claim that tidal friction is gradually lengthening the solar day. Mentions 57: Time, Ain't On My Side May 9, 2014 50:57 time is actually slowing down 51:24 the solar day is actually lengthening by 1.7 milliseconds each century