I have existed for over 300 million years, long before dinosaurs ever walked the Earth.
I am extremely tough and can withstand much higher radiation levels than humans.
I can survive for about a week without my head because I don’t need it to breathe.
I can hold my breath for up to 40 minutes and survive underwater for a short time.
I can run up to 3 miles per hour, which is incredibly fast for my size.
What am I? Come find me.