Send a Google Drive attachment. 1  Open Gmail. 2  Click Compose. 3  Click Google Drive 4  . Select the files you want to attach.  At the bottom of the page, decide how you want to send the file: Drive link: This works for any files stored in Drive, including files created using Google Docs, Sheets, Slides, or 1  Forms. Click Insert.
A suggested explanation for an observable phenomenon or prediction of a possible causal correlation among multiple phenomena. In science, a theory is a well-substantiated, unifying explanation for a set of verified, proven hypotheses.
The Universe is all of time and space and its contents. The Universe includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy. The observable universe is about 28 billion parsecs (91 billion light-years) in diameter at the present time. The size of the whole Universe is not known and may be infinite.