This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

ST. LOUIS – The 21st century is changing the way we communicate with each other.

According to author Gretchen Mcculloch`s new book: ‘Because Internet: Understanding The New Rules of Language’ innocent punctuation like a period can cause for worry.

McCulloch says younger generations see texts ending with a period as ‘aggressive.’ That’s because people don’t normally talk in complete sentences, and periods can add quote ‘a feeling of solemnity to a statement.’

‘Keysmashes” are another new development in the evolution of communicating. It`s when someone hits many random letters and symbols on their phone at once to indicate stress.