Before the oldest dinosaur, before animals or even plants had expanded onto dry land, ancient relatives of starfish called crinoids, resembling stalked sea flowers, were among the first creatures to flourish in Earth's earliest coral reefs more than 450 milli…
Before the oldest dinosaur, before animals or even plants had expanded onto dry land, ancient relatives of starfish called crinoids, resembling stalked sea flowers, were among the first creatures to … [+6081 chars]