[jdlshore]

Oobleck (corn starch and water) will do this too. But presumably they already knew that. The article describes it as being known to happen in “complex fluids,” but that it was news that it happens in “simple fluids.” Presumably silly putty and oobleck are “complex fluids?”

[EA-3167]

Specifically they're the subtype of non-Newtonian fluids, and it's also a colloid, and certainly is very elastic.