All of you will be familiar with those educational graphics that put into stark perspective how tiny is our place in the Universe, how on a clock that began ticking with the origin of life, humans evolved less than a minute before midnight. And the time since Current Biology began, 25 years ago, would be the merest fraction of a second. Yet, with our distorted perspective, we have felt this anniversary worth noting, as we did back in January with a special issue on ‘The Biology of Fun’ [1]. We took the opportunity then to note the fun we have in producing the journal and to demonstrate, through the collected articles, the importance of ‘fun’ as a biological concept.