Heroes Not Zombies

You know these seeds which helicopter down from the trees? Strangely one-winged and decidedly “wonky” looking?

Well, maybe humans wanting to make something which would be carried on the wind wouldn’t design it like this, but, hey, Nature’s designs are the best!

So, sometime, maybe last autumn, this little seed spirals its way from a tree, who knows which tree, and tumbles and flies and skips and zigzags its way through the air, to land here, on the forest floor. Then, a few months later, who knows how it knows, it wakes up, yawns and starts to stretch, feeling that Spring is around the corner.

And look at it now!

Out of the pod uncoils a long stem, probing down through the moss to find nutrients, and begin to grow itself into a tree!

I mean, do you ever stop and consider something like this?

Have you any idea how it happens?

We can’t even tell if an individual seed is alive or not, is viable or not, until it wakes up and begins to develop. Isn’t that incredible? That we can’t even tell if it alive or dead? Nobody can.

Then how do the cells start to divide and “differentiate”? That means start to develop into the different cells which will produce all the different parts of the tree.

One of my most favourite and most memorable lecturers at Edinburgh University was the Professor of Anatomy, Professor Romanes. He used to start a lecture with a box of coloured chalks and one of those giant rotating blackboards which gave you one screen after another. By the time he finished he’d produced what were no less than works of art showing each different kind of cell, each different kind of tissue, in a different colour. We were transfixed.

He gave a series of lectures on embryology taking us through the various stages of development of a foetus from a fertilised egg cell to a ready to be born baby. I remember thinking at the time, and those thoughts are still with me, “how on earth does that happen?”

I mean, how on earth does a single fertilised cell divide and multiply and differentiate to produce all the organs, all the tissues, all the parts of a human body, and every one of them in the “right” place?

It utterly amazed me.

It still does.