I found an archive for the same paper dated Jan 03 1939 about an electronic microscope from the radio corporation of america? Op, can you post a link to your archive?

Didn’t search for the article, but is it talking about this: https://en.wikipedia.org/wiki/Acoustic_microscopy?wprov=sfti1

On mobile in a meeting, sorry if I’m wrong.

2 million years old sample is the oldest.

The 2022 Nobel Prize in Physiology or Medicine was awarded to Svante Pääbo “for his discoveries concerning the genomes of extinct hominins and human evolution”.[38] A few days later, on the 7th of December 2022, a study in Nature reported that two-million year old genetic material was found in Greenland, and is currently considered the oldest DNA discovered so far