These patterned stripes are part of Erg Chech, a desolate sand sea in southwestern Algeria, Africa, where the prevailing winds create an endlessly shifting collage of large, linear sand dunes.

Employee Resource Groups (ERG) are slowly popping up for workers over age 40.

So it is fully in accord with Maslow's needs theory or Clayton Paul Alderfer's ERG theory, that these three levels of need be coexisted in every person.