Google Scholar is a web search engine.
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. Google Scholar helps you find relevant work across the world of scholarly research.
Where is this?
How to search by image - Google instructions
Searching by image allows you to do a reverse image search and discover all sorts of content that's related to a specific image. For example, search using a picture of your favorite band and see search results that might include similar images, webpages about the band, and even sites that include the same picture. (Google)
Google News is a computer-generated news site that aggregates headlines from news sources worldwide and groups similar stories together.