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Find websites that are more relevant to your needs by using the advanced search features in Google
You are researching how stem cells from human embryos might help cure neurological diseases, especially Parkinson's disease
As outlined in the example search in the image below, you can use the following advanced search limiters are used and why:
Limiter: this exact word or phrase
this will wrap whatever words you place into the box in quotation marks - that will limit the results to websites with this exact phrase
Limiter: any of these words
By putting in "neural disease" OR "Parkinson's disease" - your search will show you websites that refer to either neural disease OR specifically to Parkinson's disease (a type of neural disease). This broadens your search
Limiter: none of these words
Use this limiter by putting in a term or phrase that you do not want to see on any of the websites. The example word of cloning will not show up in your results about stem cells.
Limiter:site or domain
And since you hope to find good, authoritative websites that have content that have been thoroughly researched, limit your results to government (.gov) websites
Tip for finding useful videos: Search for your topic / subject by name AND include one of the following words-- news, interview,"vlog".
When searching YouTube for Japanese culture videos, be aware you'll locate items from a variety of perspectives. Think about what you need and what would be a good or reasonable "authority" for your research:
Example 1: Canadian "vloggers" living in Japan ("What is a Japanese Summer Festival Like?")
Example 2: Asking Japanese people about... (in English) ("How addicted are you to your smartphone?")
Example 3: A two-culture "vlogging" pair ("Japanese Internet Slang" -- Rachel is from the US; Jun is from Japan; their videos alternate perspectives between "what Japanese people don't realize about the US" and "what Americans don't realize about Japan")
Learn a New Language with Streaming Video (Chrome extensions)
This free Chrome browser extension allows you to turn TV shows and films on Netflix into French, Spanish, and other language learning opportunities. Note: Requires a personal Netflix subscription & the Chrome web browser to use.
17 languages supported (April 2021), incld. French, Japanese, and Spanish. "Subtitles are shown in two languages, allowing you to compare the original audio and text with a translation in your language."
Note - requires a Windows or Mac OS computer and the Chrome web browser.