Search engines are programs that search for and identify items based on a user input keyword, phrase, etc. Examples include google, bing, etc.
In archaeology, mesolithic is culture between paleolithic and neolithic. The term "Epipaleolithic" is often used for areas outside northern Europe, but was also the preferred synonym used by French archaeologists until the 1960s.
They all have ads. Some have inappropriate ads while some have irrelevant ads with respect to the website your on.
That would be CTRL+K
https://quizlet.com/122913134/keyboard-shortcuts-flash-cards/
hope this helps!