Google has overhauled the way it serves up results in response to search queries.
The update is designed to work out whether a person wants up-to-date results or historical data.
The US firm estimated the alterations to its core algorithm would make a difference to about 35% of searches.
The changes try to make results more relevant and beef up features which Google believes set it apart from rivals.
More at http://www.bbc.co.uk/news/technology-15590285