AI Insight
Scientists have investigated whether there is a physically meaningful upper limit to viscosity, the fundamental property that describes how materials flow. By studying Earth's deepest rocks and their deformation behavior, researchers have worked to define a threshold beyond which materials effectively become rigid rather than flowing. This research addresses a previously unexplored question about the maximum viscosity that materials can exhibit while still being considered capable of flow.
Why it matters
Understanding the upper limits of viscosity has important implications for modeling geological processes in Earth's deep interior, including mantle convection and plate tectonics. This knowledge could improve predictions of long-term geological behavior and help scientists better distinguish between materials that can flow over geological timescales versus those that are effectively rigid.
Understand the Science
Viscosity is one of the most fundamental physical properties used to describe how materials flow. It governs the movement of liquids, molten rocks and even slowly deforming regions deep inside the Earth. While scientists have long studied materials with low or moderate viscosities, a simple but important question has remained largely unexplored: Is there a physically meaningful upper limit to viscosity?