Time travelling to the mother tongue is a fascinating article from The University of Cambridge. It tells about how researchers have used technology and statistics to determine how words sounded 8,000 years ago.
For example, listen to how the English word “one” got to what we write and say now.
You can listen to all the “ancient sounds” here.
Addendum: Oops, when I originally published post I forgot to credit Multilingual Matters for the tip. Sorry.