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The other explosion you should know about

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Fossils found around the world suggest that multicellular life was not only present before the Cambrian Explosion, it was much more elaborate and diverse than anyone thought. This is the story of the sudden burst of diversity that marked the dawn of truly complex life on our planet.

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What discovery did Reginald Sprigg make in 1946, and why was it initially not taken seriously?

a

He discovered a new type of mineral, but it was considered common at the time.

b

He found fossils that resembled jellyfish in a stratum of rock over 550 million years old, which was older than the previously known oldest fossils.

c

He discovered the remains of dinosaurs, but they were believed to be fabrications.

d

He found ancient human artifacts, but they were deemed too modern.

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