ybooks

Readers

Casey Handmer

Founder of Terraform Industries and formerly a physicist at NASA's Jet Propulsion Laboratory; writes about energy, space and manufacturing.

8 books on the record · 26 Jul 2020 – 1 Oct 2024 · @CJHandmer

The bar next to each date shows how long ago it was said: 7d is days, 4yr is years.

Everything Casey Handmer recommends — not just books — on rcmnd →

That little bar

It says how long ago something was said, so you can tell last month from 2014 without doing the arithmetic. Full and green is recent; it drains and cools as the date gets older, and empties completely at about 6 years.

A striped bar means the date itself is an estimate — the source did not carry an exact one. An entry with no date at all gets no bar.