Ah, 'tis great to go on field excursions with enthusiastic experts! We had a real aficionado teaching us palaeobotany who thought nothing of dragging us off with our shiny new geological hammers to the Jurassic cliffs on the Yorkshire coast in the teeth of an easterly gale and temperatures of minus 2. You can't imagine that unless you've experienced it. I wore every scrap of clothing I'd taken with me for the weekend, including my pyjamas, and I still nearly died! One of our botany lecturers (still an active botanist I believe, and a world expert on Bryophytes, well into his 90s now) once took us on a day-trip to Box Hill. We spent almost as long studying the weeds around Boxhill and Westhumble Station and along the road down to the river Mole as we did on Box Hill! Good times!