Yet another weird SF fan
 I'm a mathematician, a libertarian, and a science-fiction fan. Common sense? What's that?Go to first entry

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 Yet another weird SF fan

### Uber and NASA

There's worry about whether Uber can contribute to killing the planet. On the other hand, according to NASA, we've got spares.

One disadvantage of the new planet: It's 1.5 billion years older than the Earth, which means it has $$\frac{1}{4}$$ as much uranium 235 (assuming it started out with the same amount). That might make it harder to jump start a nuclear industry. On the other hand, it means fewer worries about nations run by maniacs.