Mark H
Alpha Centauri B: A Close Look at the Habitable Zone - http://www.centauri-dreams.org/...
Alpha Centauri B: A Close Look at the Habitable Zone
"Centauri A and B, being high metallicity stars, are presumably prime candidates for circumstellar disks with a high solid material component, making the building blocks of planets readily available, and deepening the spectral lines for improved precision in radial velocity studies." - Mark H from Bookmarklet
"It is reasonable to speculate that if life were to exist on planets around α Cen B, that they may develop two circadian rhythms (cf Breus et al. 1995) corresponding to both the length of day around the primary, and the period of the secondary’s orbit (approx 70 years). Altering the available habitat by a few percent may also influence migration patterns and population evolution." - Mark H