Sargasso Sea European American eel spawning migration

European eels cross the Atlantic to reproduce in the Sargasso Sea

European eels spend much of their lives in rivers and coastal waters, then migrate thousands of kilometers across the Atlantic to spawn in the Sargasso Sea. American eels also reproduce in this region. Ocean currents carry their young back toward different continents, completing one of nature's most remarkable migration cycles.

Venice became a European printing capital

417 printers by 1500

By the end of the 15th century, Venice had become a center of European printing. The Aldine Press helped establish modern punctuation, page formats, and italic type—features still used in books.

Old wood-pulp paper slowly destroys itself

Chemicals used to make much wood-pulp paper in the 1800s and early 1900s left it acidic. Over time, the acid breaks the paper down until it becomes weak and brittle. The process has been called a "slow fire" because the paper gradually destroys itself.

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Sargasso Sea European American eel spawning migration

European eels cross the Atlantic to reproduce in the Sargasso Sea

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