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Studies on the shear behavior of viscoelastic fluids, created by introducing polymers into Newtonian fluids, have already been conducted in recent years.

Until now, researchers have hypothesized that viscoelastic energy dissipation causes adhesion hysteresis in soft solids.

Once inside, two things prevent a hasty escape: downward pointing hairs lining the inner pitcher wall, and a pool of liquid that is sometimes so viscoelastic it resembles quicksand.

Finally, Torok and her colleagues went one step further, dissecting a series of cellular signals that promote liver cancer progression in viscoelastic conditions that includes a cancer-associated protein called YAP.

Mucus, a viscoelastic fluid, behaves as both a liquid and solid.