Did complex animals exist before the Cambrian explosion

Complex animals existed before the Cambrian explosion

Large and varied organisms lived before the Cambrian explosion, and some fossils preserve tracks showing that animals could move. The Cambrian explosion therefore looks less like the sudden beginning of complex animal life and more like a later period when existing animal groups spread and changed especially quickly.

Elizabeth I treated an explorer's voyage as a state secret

After Francis Drake returned from his circumnavigation in 1580, England had valuable information about distant coasts, trade routes and Spanish possessions. The government restricted details of the expedition, partly to keep them from rival Spain. Geographic knowledge was a strategic asset, not merely an interesting record of exploration.

A rainy winter can turn the Dead Sea red

In 1980, a rainy winter lowered the Dead Sea’s salt level. Algae called Dunaliella nourished red-pigmented bacteria, and the brief microbial bloom turned the usually dark-blue water red.

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Did complex animals exist before the Cambrian explosion

Complex animals existed before the Cambrian explosion

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