
The festival spilled over onto the lawns behind the Town Hall
In my third report on the Cheltenham Science Festival I want to cover the last three talks I managed to see. So, without further ado, let me introduce Alien Evolution, When to listen to heretics, and “Penisology”!
Alien Evolution
This was quite low-key compared to some of the other talks. The presenter, an astrobiologist, first talked about how humanity might change if we lived our lives in space. The major hurdle is that embryos require a gravity “cue” to develop, so reproduction would be rather problematic. Add to this cosmic radiation and microgravity and it would not be as easy as sci-fi movies have been telling us! Secondly, if we find alien life on a “second Earth”, what would it look like? We heard about the basic requisites for life, and the things constraining life wherever it evolves: plant-like life still has to overcome the need to gather light against the problems of having a large surface area in different climates, and animal life must evolve to move over land or through the air or water.
A speculative subject, but it was good fun to explore some of the weirder “what if” scenarios that arose from audience questions.
When to listen to heretics
Presented by a favourite author of mine, Matt Ridley. He talked about some of the crazy “scientific” ideas (crop circles!) of recent times, and some of the seemingly crazy ideas that turned out to be right (antisepsis and child-birth). Towards the end we heard about the role of journalists in things like the MMR vaccine scare, and the need for journalists to check their sources and not be swayed unduly by a person’s title or “expert” status. Very interesting stuff, and several of the examples were object lessons in how not to report science in the media.
“Penisology”
The final talk of the day – post-9pm watershed – was a very different affair. A small audience consisting mostly of groups of women and couples laughed along to a quick run-down of the animal kingdom’s more unusual reproductive techniques. Everything from enormously well-endowed ducks to the violent love-lives of bed-bugs was covered, and the talk was followed by some quirky and rather enlightening audience questions. It was a very enjoyable end to the day, and an interesting way of bringing in an audience that might not normally come to a science festival.
My overall conclusions of the festival – Good fun and very thought-provoking. I wonder how much of it is preaching to the converted and whether such events do attract new people to engage with science? I suspect it does, and it’s obviously a very successful festival, but there’s always more we could do.

