As someone with a biology background, it's really funny when physicists dip their toes into studying life. It's like: "hmmm, what massive oversimplification can we make!"

They're intelligent agents that can choose whether or not to hold onto their neighbors, so of course they are both solid-like and liquid like.

I'm kind of expecting the next headline to be: "wood can be both solid-like and liquid-like, depending on how much we pulp it."