As the Avatamsaka Sutra says, "In a speck of dust, one learns to see the world." Researchers from the Institute of Theoretical Physics of the Chinese Academy of Sciences (ITP-CAS) and Shanghai Jiao Tong University (SJTU) have found that granular matter (such as sands) and some black hole models display similar nonlinear effects. The bridge between the two is the gravitational holographic duality.