Non-Newtonian fluids are solid if you apply a sudden force and liquid if you apply a steady, slow force. How can something be a solid and a liquid? In the mix, there are tiny cornstarch particles ...

They designed a “micro-scallop” that could propel itself through non-Newtonian fluids, which is what most biological fluids happen to be. The scientists decided on constructing a relatively ...

but from interlocked rings or cage-like particles that form three-dimensional networks. When gently deformed, they can stretch and twist, changing their structure like non-Newtonian fluids.