OK, now, these are my sprinting legs, made of carbon graphite, like I said, and I've got to make sure I've got the right socket.

They're both made of carbon, and yet one of them has carbon atoms in it that are arranged in one particular way on the left and you get graphite, which is soft and dark.

Basically what we can do, is just cut a graphite mold, put it in an oven, heat it to 1,000 degrees, gently inflate titanium that's soft, and then explode it at the last minute into this form.

And I'm up there in Boston against people wearing legs made of all things carbon graphite and, you know, shock absorbers in them and all sorts of things and they're all looking at me like, OK, we know who's not going to win this race.

One of the materials that can do this is a remarkable material, carbon, that has changed its form in this incredibly beautiful reaction where graphite is blasted by a vapor, and when the vaporized carbon condenses, it condenses back into a different form chickenwire rolled up.

The coal comes from Colombia, and costs 300 per ton if Antillana had been able to negotiate with United States manufacturer UCAR, from which it would be able to get the world's best carbide graphite electrode, that raw material would be obtained free, because of the contract undertakings UCAR has with its purchasers.

I am of course quoting from a famous essay by Leonard Read, the economist in the 1950s, called I, Pencil in which he wrote about how a pencil came to be made, and how nobody knows even how to make a pencil, because the people who assemble it don't know how to mine graphite, and they don't know how to fell trees and that kind of thing.