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Long before Boeing
se ha fugado
The collection is a wonderful choice for shared reading and singing with parents
An Echo in the Bone
Pikaia Enamel Pin (Pikaia gracilens) beautiful creatures Long before BoeingMeet 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
