FOSSIL STARFISH: AN ANCIENT STAR IN A CHANGING SEA

Fossil Sea StarStarfish—or, more accurately, sea stars—look almost too geometrically tidy to be real. Their familiar five-pointed form resembles a symbol drawn by hand, yet sea stars are living animals with hundreds of hydraulically operated tube feet, light-sensitive eyespots at the tips of their arms and the remarkable ability to regenerate damaged tissue. Some can even push their