And, as an aside, brother to the planetary scientist David Grinspoon.[0] [0]: https://en.wikipedia.org/wiki/David_Grinspoon https://en.wikipedia.org/wiki/David

And, as an aside, brother to the planetary scientist David Grinspoon.[0] [0]: https://en.wikipedia.org/wiki/David_Grinspoon https://en.wikipedia.org/wiki/David_Grinspoon EDIT: Peter has his own Wikipedia page too: https://en.wikipedia.org/wiki/Peter_Grinspoon https://en.wikipedia.org/wiki/Peter_Grinspoon