50 years ago today, October 29, 1969, the world's first message was sent between two computers.

The Internet has impacted our lives on good and evil, says Annakarin Nyberg, internet researcher at Umeå University and author.

- The distance between people with the same interests was shrinking in the world we find ourselves. When it comes to working life, we have become more efficient, ”she says.

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Being interrupted in one's work is one of the downsides of being constantly connected. Researchers have looked at how we behave after stopping for, for example, a note that comes to us.

- It will take at least a minute before we are back and it is not at all certain that we will continue with what we were doing if we are interrupted, says Annakarin Nyberg.

Hear Annakarin Nyberg about the pros and cons of the internet in the clip above.