Florida’s Invaders: Water Lettuce

As an invader, Water Lettuce is older than the United States itself—it was first recorded in Florida way back in 1765. And now this tough little aquatic plant has become a full-fledged environmental pest.

Water Lettuce

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USS Michigan: The US Navy’s First Iron-Hull Ship

Although ironclad warships—wooden hulls covered with metal plates—were a staple of both the Union and Confederate navies in the Civil War, the first US Navy ship to be made completely of iron had already been built some twenty years before, and launched on the Great Lakes.

Prow of USS Michigan, on display at the Erie Maritime Museum

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Forgotten mysteries, oddities and unknown stories from history, nature and science.