Science doesn't stand still, nor should it. I remember reading several years ago that some academics had calculated the "half-life of scientific knowledge" at 45 years i.e. in that many years time half of current scientific understanding will be superseded by new knowledge. You can see this at the layman's level in the name changes that animals and plants periodically undergo as DNA and genetic research re-classify species. One example from the garden is a New Zealand shrub with yellow flowers and grey/green leaves. For decades I have called it Senecio greyi: now it is Brachyglottis greyi. Today's offering is a contrasty black and white photograph of this plant's leaves.
photo © T. Boughen Camera: Olympus OMD E-M10
