The reach of tribology has expanded in diverse fields and tribology related research
activities have seen immense growth during the last decade. This review takes stock of the …

The fascinating patterns of collective motion created by autonomously driven particles have
fuelled active-matter research for over two decades. So far, theoretical active-matter …

Collective cell migration is a key driver of embryonic development, wound healing, and
some types of cancer invasion. Here, we provide a physical perspective of the mechanisms …

Physical interfaces widely exist in nature and engineering. Although the formation of passive
interfaces is well elucidated, the physical principles governing active interfaces remain …

During the growth of a cell collective, such as proliferating microbial colonies and epithelial
tissues, the local cell growth increases the local pressure, which in turn suppresses cell …

Collective migration—the directed, coordinated motion of many self-propelled agents—is a
fascinating emergent behavior exhibited by active matter with functional implications for …

Tissues do not exist in isolation—they interact with other tissues within and across organs.
While cell-cell interactions have been intensely investigated, less is known about tissue …

During the spreading of epithelial tissues, the advancing tissue front often develops
fingerlike protrusions. Their resemblance to traditional viscous fingering patterns in driven …

In contexts ranging from embryonic development to bacterial ecology, cell populations
migrate chemotactically along self-generated chemical gradients, often forming a …

Cells coexist together in colonies or as tissues. Their behavior is controlled by an interplay
between intercellular forces and biochemical regulation. We develop a simple model of the …