There are ultra thin credit card size BT / GPS trackers designed for wallets. https://duckduckgo.com/?q=credit+card+size+gps+tracker&ia=we...

Cool!

Area code 272 (CSC for 'Cancer Support Community') 1-272-867-5309

There's a star trek fan who has a primary dog and an emergency backup dog. There's also the british 'heir and a spare'.

There's a 'build the Japanese train system' board game "1889" -- https://boardgamegeek.com/boardgame/23540/shikoku-1889 -- https://www.amazon.com/Shikoku-1889-Railways-Players-Minute/...

Obligatory xkcd. Mouseover for The Last Answer. https://www.explainxkcd.com/wiki/index.php/1448:_Question

A perfect hash function https://en.wikipedia.org/wiki/Perfect_hash_function has to be specially constructed for each desired set of inputs. Generic hash functions cannot be 'perfect'.

Original paper: https://www.science.org/doi/10.1126/sciadv.aec2916

Many people who switch religions are not completely tacked down around the edges.

It can be any colour you like.

Every 20 years, Jupiter and Saturn are in position for a gravity assist, which allows you to reach half the outer solar system. In the 1970s, Uranus, Neptune and Pluto were all in the right half.