Viscosity

Researchers at Georgia Tech have discovered that frog saliva switches between watery and viscous states, allowing the animals to both catch prey and then whip it back into their mouths. The findings could have implications for human technology.​

It's a simple fact that the more fluid an oil is, the easier it is to pump. That's why Temple University's Prof. Rongjia Tao has developed a device that reduces the viscosity of crude oil by electrifying it.

Researchers from the Max Planck Institute for Intelligent Systems, in Germany have been experimenting with real micro-sized robots that literally swim through your bodily fluids with the idea of delivering drugs or other medical relief in a highly-targeted way.

A decades-long experiment at Trinity College Dublin has been caught in the act of providing a new data point. Pitch is a (very) viscous liquid, with a viscosity of 20-100 billion times the viscosity of water.