226

The late Dr. Robley Evans was the first person to come up with a defined safety limit for radiation in the human body: 0.1 microcuries (uCi) of radium-226.

Madame Curie herself, for whom the unit of measure was named, perished from excessive exposure to radiation. For those of us who labor in anonymity in blogdom, excessive exposure is hardly our problem, which is one reason why there's the Carnival of the Vanities, edition 226 of which is now available for inspection.