In which a friend beyond measure arranges a behind-the-scenes visit to the Natural History Museum to see fossils collected by Charles Darwin during the Beagle voyage.
The great Darwin fossil hunt
molluscs
It's been a great summer if you're a mollusc
Slug photographed in my compost heap.
Hypothesis well and truly falsified!
There are snails in my garden!
An ugly fact
Snail find falsifies my hypothesis.