We are Homo duplex, as Durkheim explained.

Computes the melting temperature for a nucleic acid duplex.

Durkheim even called us Homo duplex, or two level man.

Although I worked very long hours, I lived in a penthouse in Union Square.

And we are Homo duplex because we evolved by multilevel selection, as Darwin explained.

What's missing is that we are Homo duplex, but modern, secular society was built to satisfy our lower, profane selves.

Now, to a human audience, I need to explain that if Penthouse magazine had a marine mammal edition, this would be the centerfold.

I'm saying we are Homo duplex and this staircase takes us up from the profane level to the level of the sacred.

For on the surface, Lyndon Johnson should have had everything in the world to feel good about in those last years, in the sense that he had been elected to the presidency he had all the money he needed to pursue any leisure activity he wanted he owned a spacious ranch in the countryside, a penthouse in the city, sailboats, speedboats.