You can read more about the experiment here: https://www.katrin.kit.edu/68.php https://www.katrin.kit.edu/68.php https://en.wikipedia.org/wiki/KATRIN https://

You can read more about the experiment here: https://www.katrin.kit.edu/68.php https://www.katrin.kit.edu/68.php https://en.wikipedia.org/wiki/KATRIN https://en.wikipedia.org/wiki/KATRIN (the German WP entry is better though if you don't mind using an online translator)