Oxford Comma

I am wholeheartedly on the side of using it. I will always add it when editing and will defend its use to my death. Not that I feel strongly or anything. . .

1 in a million chance

The math here is incredible. As I have often said, it is very hard for humans to understand/comprehend really big numbers. This give us a better sense of that. And, it is just amazing to think about how much Twitter is used on a daily basis.

Where Time Comes From

The science behind this blows my mind.  The most amazing part is when he talks about how 2 clocks 3 meters apart can be measurably different because of the effect of gravity.  I also liked that he gives a nod to the philosophy of time, which can be pretty mind blowing as well.  He can give a definition for a  second, but not one for time itself.  Very cool.