⟳ Репост от Barbara J. King
For #FossilFriday, meet the oldest known "righty" in the animal kingdom & the earliest animal with a head: Spriggina floundersi. It measured just a few centimeters long & favored its right side, according to research led by @amnh.org's assistant curator of invertebrate paleontology Scott Evans 🧪
Mindy WeisbergerWhether you're a righty or a lefty, favoring one side over the other is a trait in animals that's incredibly old. In fact, scientists just identified the earliest evidence of this preference, in an ancient wormlike weirdo that lived about 550 million years ago and tended to bend to the right 🧪