You can search for anything on Google, right? At least, so I thought. I was trying to see how the special characters get encoded in the url, like how & gets converted to %26. I started searching for *. It did not get encoded, but weirdly google didn't tell me that it was an asterisk symbol. All other search engines (yahoo, bing, duckduckgo) did. See for yourself : In Google. Basically it treats it as a regular expression. So *+* will also not give any results. Still, shouldn't Google at least say that * is the asterisk symbol.I don't know where else to ask this question, so I came to SO. 
Why doesn't Google give search results for '*' [asterisk]?
regex;google search