By KiddieDaily Editors · Jun 29, 2026 · 3 min read · Ages 10–12 · 1 source

5 Inventions That Have Been Lost to Time

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Share on XShare on RedditCopy ArticleAdd us as a preferred sourceScientific progress is rarely linear, but it’s fairly unusual for an invention to be created and then completely lost to time.

A couple of often-touted examples include Stradivarius violins and Damascus steel—but neither of these actually qualify because, while the specific techniques once used to create them have been lost, they have effectively been recreated by modern luthiers and blacksmiths respectively. But there are a handful of lost inventions that modern science hasn’t been able to recreate (at least so far!)—here are five of them. Scientific progress is rarely linear, but it’s fairly unusual for an invention to be created and then completely lost to time.

A couple of often-touted examples include Stradivarius violins and Damascus steel—but neither of these actually qualify because, while the specific techniques once used to create them have been lost, they have effectively been recreated by modern luthiers and blacksmiths respectively. But there are a handful of lost inventions that modern science hasn’t been able to recreate (at least so far!)—here are five of them. Italian anatomist and naturalist Girolamo Segato took his first archaeological trip to Egypt in 1818, and five years later he had created his own preservation technique inspired by ancient Egyptian mummification.

But instead of dehydrating corpses as the Egyptians did, Segato essentially petrified and mineralized them, thereby preserving the body’s original shape and color. Italian anatomist and naturalist Girolamo Segato took his first archaeological trip to Egypt in 1818, and five years later he had created his own preservation technique inspired by ancient Egyptian mummification. But instead of dehydrating corpses as the Egyptians did, Segato essentially petrified and mineralized them, thereby preserving the body’s original shape and color.

A surgeon from America, Valentine Mott, visited Segato and later wrote that the Italian’s petrification method left a cadaver “in a state of such stony hardness that it could be sawed into slabs and elegantly polished!” Segato was reluctant to share the secrets of his technique, though, and even destroyed all of his scientific notes after a few burglary attempts on his house. A surgeon from America, Valentine Mott, visited Segato and later wrote that the Italian’s petrification method left a cadaver “in a state of such stony hardness that it could be sawed into slabs and elegantly polished!” Segato was reluctant to share the secrets of his technique, though, and even destroyed all of his scientific notes after a few burglary attempts on his house. When Segato died in 1836, all knowledge of his petrification process died with him.

His tombstone in Florence’s Basilica of Santa Croce reads: “Here lies Girolamo Segato, his body hard as stone, if only his art hadn’t perished with him.” When Segato died in 1836, all knowledge of his petrification process died with him. His tombstone in Florence’s Basilica of Santa Croce reads: “Here lies Girolamo Segato, his body hard as stone, if only his art hadn’t perished with him.” In the fantasy book and TV series Game of Thrones, there’s an incredibly dangerous incendiary weapon called wildfire that burns bright green and can’t be extinguished by water. Such a weapon might seem fantastical, but a real-world version did once exist (it just wasn’t a vibrant green color!)

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