Are there shadows when you can’t see them?  Others forces exist though invisible like tides, winds, markets, seasons, combustion,  zeitgeist, …

inertia, gravity,

attitude, determination, pheromones,

friction, electromagnetic fields, stardust,

love potion #9, entropy, tea leaves . . ..

Why things happen . . . a soup of forces govern this, too many to keep track of, unless you have to. 

All fotos by Will Van Dorp, who has forces tugging at his heels today.