[Randall Munroe: Comics that ask “what if?”] (Viewer #132,580)
The baseball talk is interesting, but it stops at 2:30, then he starts meandering from topic to topic, and it’s ok, but not nearly as interesting. If you’re in a hurry, feel free to quit at 2:30.
Someone once claimed that a grain of sand with a temperature of 20,000,000 degrees (like at the center of the Sun) a mile away would burn you to death. I haven’t run the numbers but it sounds plausible.