biology zoology blog benno meyer rochow wings

Reductions and Concentrations

Advantages of having less

One of the most frequent comments I have to scribble on the margin of my students’ essays, assignments and reports is “condense” or “shorten and compress”. It’s exactly what evolution has done (via the survival of the fittest) with certain organs and structures of the animal body. In a way it’s the opposite of what I had written in a different blog about duplications and repetitive structural elements (the million of identical nephrons in the kidney come to mind, the hundreds of identical legs in some millipedes ring a bell and even the dozens of identical teeth in the mouths of dolphins may be remembered). Therefore, how about the opposite? It’s actually easier to find examples for reductions of structural entities in animals and we can almost use examples from the same animal groups mentioned earlier in connection with duplications. —>—>

biology zoology blog benno meyer rochow horse painting

Who Depicted Walking Horses More Accurately: prehistoric or modern artists ?

I’m not at all a great rider and have tried to avoid sitting in the saddle as much as possible. Why? because I’m a little scared of horses for I was once bitten in the face by a horse when I was a child (yes “bitten”, not kicked: horses can and do bite sometimes). However, that doesn’t mean I don’t appreciate paintings or photographs of horses and in fact, both of my daughters in Finland were members of a riding club. —>—>

biology zoology blog benno meyer rochow blue light

Dawn of vision

Dawn of vision – And why blue light might be so special

Virtually all mammalian species exhibit some kind of circadian rhythm that affects their activities. These rhythms parallel the cycle of day and night and are, thus, in most cases linked to the perception of light. However, major surprises were in store for scientists, when they investigated whether mutant mice, lacking the well known image-forming rod and cone cells in their retinas, still possessed a circadian rhythm. —>—>