Contact & Corrections

Spot a wrong number? Send the page and a source link.

A clear email beats a form. Include your browser, OS, and the page address — we read everything.

The fastest way to reach us is plain email — we read everything.

Reporting a wrong number? Please include: the page address, what you believe is wrong, and a link to a source that shows the correct figure. Corrections with verifiable sources get priority.

Suggestions for new objects are welcome too — a candidate with a good public source (standards body, government agency, zoo, university, manufacturer spec) can be added quickly.