Agaya came from merging the words agape and Gaia. Gaia references the Gaia Theory that Earth systems interact to promote life's resilience. Agape is divine, altruistic love.
This video describes some of the science supporting ubuntu. This is a talk by Tom Chi at TEDxTaipei, who never uses the term ubuntu. Nonetheless, what he describes is the underpinnings of ubuntu in physics, cosmology, chemistry, biology, and neuroscience.