Another way in which the two differ is the relationship to gravity. Put briefly, in classical ballet there is a pulling up and away from gravity, at least aesthetically speaking. (In reality, ballet dancers also need to learn how to direct energy both up and also down into the floor, but the 'look' in classical (not always contemporary) ballet is one of lightness, lift, and escape from gravity). Many modern dance styles, especially the older ones beginning with Martha Graham, are founded upon groundedness, giving in to gravity, using gravity as a powerful force, an "earthiness"--hence more use of the floor in modern dance. Of course, many styles now blend the use of both, but those tendencies still remain, and is one reason that the experience of dancing these two different dance forms can be tricky to navigate.