I got a keychain that uses the radioactive decay of Tritium (the radioactive isotope of hydrogen) to emit light. | /r/mildlyinteresting
Uploaded by Reddit Moments Feb 25, 2020 at 01:22AM EST
reddit /r/mildlyinteresting keychain
Origin Entry: Mildly Interesting
File type: jpg
Resolution: (3464px x 3464px)
File size: 316 KB