Subtle changes have made their way into the reality that we are all sharing at this moment. Many of the changes are very subtle and one would never recognize them. Other changes question and challenge our collective memories.
The frequency of the changes has increased to the point where people are starting to take notice. The common and unscientific term used to describe this phenomenon is "Mandela Effect". Scientists have other theories and explanations. Quantum computing have accessed parallel universes with "slight differences".
Many examples of the Mandela Effect can be viewed on the following videos: