Cambrian Period
A re-examination of a 1970s fossil has revealed that Hallucigenia, one of the oddest creatures from the Cambrian period, may have fed on the corpse of a comb jelly. The discovery shows spines from seven Hallucigenia individuals scattered over the remains of the gelatinous organism. This provides a rare glimpse into the ancient animal's possible diet and behavior.
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A 540-million-year-old fossil known as Salterella, which puzzled scientists for decades due to its unique double-layered shell, has been linked to the cnidarian family, including jellyfish and corals. This discovery from the early Cambrian Period reveals innovative skeleton-building methods among early animals. The findings, led by Prescott Vayda of Virginia Tech, were published in the Journal of Paleontology.