In my own research when I'm working with equations, I never feel like I really understand what I'm doing if I'm solely relying on the mathematics for my understanding. I need to have a visual picture in my mind. I'm constantly translating from the math to some intuitive mind's-eye picture.
Our eyes only see the big dimensions, but beyond those there are others that escape detection because they are so small.
The pinpoints of starlight we see with the naked eye are photons that have been streaming toward us for a few years or a few thousand.
I've seen children's eyes light up when I tell them about black holes and the Big Bang.
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