Radioactivity in Food
Brazil nuts, mineral water, bananas — what's really in our food and whether it's anything to worry about.
Radiation, put in perspective
Radiation, put in perspective
How much radiation is in a flight, an X-ray, a Brazil nut? The knowledge section gives you the numbers to judge for yourself.
Flying & Cosmic Radiation
How much radiation you pick up on a flight — and whether frequent flyers should be concerned.
X-Rays at the Dentist & Doctor
How much dose is in an X-ray, why the lead apron is disappearing, and what applies during pregnancy.
Understanding Radiation
Millisieverts, becquerels, and live radiation maps — the basics you need to put any radioactivity number in context.
Two free calculators from kurse.dirkschulze.ch:Flight dose calculator ·Dose calculator for X-rays & CBCT
Sister site
Invisible risks at home
The biggest everyday radiation source waits at home: radon. Our sister site covers the invisible risks of the house — from radon in the basement to asbestos to tap water.
Visit unseenhouse.com →