  Web Search Engine Results Pages (SERP) are one of the most well-known and
used web pages. These pages have started as simple ``10 blue links'' pages, but
the information in SERP currently goes way beyond these links. Several features
have been included in these pages to complement organic and sponsored results
and attempt to provide answers to the query instead of just pointing to
websites that might deliver that information. In this work, we analyze the
appearance and evolution of SERP features in the two leading web search
engines, Google Search and Microsoft Bing. Using a sample of SERP from the
Internet Archive, we analyzed the appearance and evolution of these features.
We found that SERP are becoming more diverse in terms of elements, aggregating
content from different verticals and including more features that provide
direct answers.
