In OS X, you can do this: 1. Copy the text of the talk and save it to a file, say "life.txt" 2. Use the "say" command to read it: $ say < life.txt To ch

In OS X, you can do this: 1. Copy the text of the talk and save it to a file, say "life.txt" 2. Use the "say" command to read it: $ say < life.txt To change the voice, go to System Preferences > Dictation & Speech and pick the one closest to Hawking's. (On my system, "Fred" comes pretty close.)