Solid-Like And Liquid-Like

Science Daily: How ants and ketchup are alike: Both solid-like and liquid-like - Just like ketchup, more pressure means ants flow easier

summary - Collections of ants have a remarkable ability to change shapes and tasks based on the demands of their environment. When floodwaters hit, they self-assemble and form rafts to stay alive. They can also use their bodies to build bridges and span gaps. What are the properties of these ant aggregations that allow for this wide range of abilities? New research says it's because the insects are actually liquid-like and solid-like simultaneously.