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by Randall Munroe, author of ‘What If?’ ‘How To’ ‘Thing Explainer’. A webcomic of romance, sarcasm, math, and language.
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不良地图投影：零偏角 || Bad Map Projection: Zero Declination

2026-02-13 13:00:00

'The zero line in WMM2025 passes through a lot of population centers; I wonder what year the largest share of the population lived in a zone of less than 5° of declination,' he thought, derailing all other tasks for the rest of the day.

安装 || Installation

2026-02-11 13:00:00

Do YOU remember the skylight being this big?

碳定年法 || Carbon Dating

2026-02-09 13:00:00

This dating is corroborated by the presence of stone tools at the site, rather than earlier and less effective helium ones.

恐龙与非恐龙 || Dinosaurs And Non-Dinosaurs

2026-02-06 13:00:00

Staplers are actually in Pseudosuchia, making them more closely related to crocodiles than to dinosaurs.

双星 || Binary Star

2026-02-04 13:00:00

The discovery of a fully typographical star system comes with a big asterisk.

土拨鼠日含义 || Groundhog Day Meaning

2026-02-02 13:00:00

Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.