: Open the file and copy a unique sentence or the abstract into a search engine.

: If you have the file, right-click and view "Properties" or "Get Info" to see if the author or title is embedded in the metadata.

The hash typically refers to a specific digital identifier (often an MD5 or SHA hash) used in academic databases, digital libraries, or file-sharing networks to index documents.

: Look for a Digital Object Identifier (DOI) on the first page (e.g., 10.1038/s41586... ). Plugging this into doi.org will take you directly to the official publication page.