'Unfortunately, body size and bite force continue to increase.'

1. "T. Rex Evolution"

'They're continuing to search for a square with the same area as the circle, as efforts to construct one have run into difficulties.'

'Can you pass the nackle?'

1. "Chemical Formulas"

'I wonder what surviving human held the record before balloons (excluding edge cases like jumping gaps on a mountain bridge). Probably it was someone falling from a cliff into snow or water, but maybe it involved something weird like a gunpowder explosion or volcano.'

1. "Human Altitude"

'Speed limit c arcminutes^2 per steradian'