I am not such a person. I am cautious and want to know something is possible before attempting it. This is quite sensible as far as I am concerned in my line of work as a vet and wildlife presenter. I don’t start an operation or course of treatment without knowing the probable outcomes based on what we refer to as ‘Evidence Based Medicine’. Also I don’t pick up an animal without being shown how it’s done by an expert. This is both to ensure I don’t stress the animal more than necessary and also because some of them are deadly. Again in both these situations I am indebted to those people who have tweaked the boundaries of known science to find a better way of doing this. These people have usually not done this without knowing all the previous accepted norms and found them wanting. Brave, often unsung, heroes in my opinion, but at least Hillary has made it onto the back of a fiver here in his homeland.