The Hump of the Camel

The second half of the Attenborough series on vertebrates, which I watched last night, kept the teleology  coming. I guess it’s pretty plausible to say that because marsupial young are at risk of predation and infection, mammals needed to develop a placenta so they could be born well-developed.

However, to be strictly ateleological one ought to say that those mammals that happened to develop a specialised uterus equipped for gas and nutrient exchange and massive growth capacity, and a modified lower genital tract, muscular and skeletal structure to allow live birth of large offspring, together of course with greatly enlarged lactation gear and radically altered habits of nurture; at the same time that their embryos grew an entirely new organ also capable of umbilical gas and nutrient exchange, and the bizarre habit of implanting parasitically into the new maternal uterus, whilst both parties neatly solved the problem of rejection but allowed the transfer of passive immunity… those mammals had some selection advantage over marsupials. That would make for a clunky storyline, though.

The most interesting thing to me in the programme, though, was a brief aside about colour vision. Continue reading →

David Attenborough is by far the greatest populariser of evolution this side of the Atlantic – far more so than the Gnu posterboy Richard Dawkins – and I suppose, because of the sheer quality of BBC documentaries, perhaps he is on the western side as well. But what kind of evolution does he actually believe? It’s pretty clear from interviews and pronouncements on the subject itself that he’s a fan of Darwin, and doesn’t depart in any important respect from classical Neodarwinism. But the stuff he prepares for popular consumption – that by which he has become a “public institution” – paradoxically preaches a quite different doctrine. And that actually seems to be a kind of vitalism. Continue reading →

It’s a fundamental fact of classical Christian (and before that, Jewish) theology that Yahweh is the Lord of human history. It is arguably that perspective that gave the west its concept of time as a linear trajectory, rather than as the endless series of cycles in other cultural traditions. Let me demonstrate with a few biblical examples. Continue reading →

I watched an interesting documentary on the Antikythera mechanism  yesterday. You’ll probably be aware of its existence as a corroded, but obviously complex, artifact retrieved from an ancient shipwreck a century ago. Within my own memory, it was an obscure object that raised the mystery of whether ancient Greeks could really have produced such a sophisticated geared mechanism, or whether it was recent, or alien. Now, through modern technology and some really hard work, its function is now known in some detail, and its inscriptions deciphered. Continue reading →

There is a kind of low-level scientism operating in the medical profession which, given the humanitarian nature of the pursuit, may seem surprising. But the reason is simple – from the time they start university, medical students are intensively engaged in scientific education and long working hours, and other interests tend to go by the board. Continue reading →