I discovered back in about April 2017 that you can't dig too deep into google search results - that is, reading through too many of the lower ranking pages of results - without prompting a captcha asking if you're a 'robot'! That's right, if you are looking for a 'specific' bit of information and FAIL to be sidetracked with their preferred 'shiny toys', google search will frown upon you and demand to know who you are.

My solution to the intrusion is to use Startpage for searching. You remain anonymous and your searches go untracked. Even though you are still using the google search engine, your persistent, unwavering, UNMANIPULATED search patterns are never seen and so you never upset google when it fails to derail your research.