Through one-liners, catchphrases and iconic exclamations, the sketch comedy show has embedded itself into American speech. A few days ago I went out to buy eggs, and only the expensive organic ones ...

Many people struggle to run a mile; others can knock out a 10K on a whim. A few brave souls take on "ultramarathons" — races longer than 26.2 miles (42.2 kilometers). But how far can a human run ...