Pikaia Enamel Pin (Pikaia gracilens) marchei This specimen is one of

This specimen is one of the set of seven wonderfully detailed half scale models

contributing to seed dispersal and maintaining the balance of plant populations

German shepherds are a popular and versatile breed of working dog

is a herbivorous browser feeding on a variety of leaves

this species has two toes that face forward and two that face backwards

Pikaia Enamel Pin (Pikaia gracilens) marchei This specimen is one ofMeet Pikaia gracilens, the humble wormlike swimmer from the Cambrian seas (~505 million years ago) that may just be one of your oldest relatives. At about 5 cm long, it didnt look like muchjust a slender, ribbon bodied creature wriggling through the Burgess Shale ecosystem. But Pikaia had something revolutionary: a notochord, the flexible rod that would eventually evolve into a backbone. That makes this little swimmer a crucial early chapter in