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If the universe is 13.7 billion years old, how can it possibly be 56 billion light-years across? Since the speed of light is constant and cannot have changed, the maximum size of the the universe measured between its two most distant points should be no more than 27.4 billion light-years wide. I'll explain a little further inside.

I was just doing another challenge earlier today.

Small cohort of mice, just a few dozen.

So I was thinking about people planting tree's to make up for the carbon cost of 'em flying from one place to another. Also, I was thinking about the fact that I breathe in oxygen more than I breathe it out, and I breathe out Carbon Dioxide more than I breathe it in.

Stupid marijuana.