"Curiosity killed the cat"is a proverb used to warn of the dangers of unnecessary investigation or experimentation.

THE DEVIL PUT DINOSAURS HERE
Leading Article: Curiosity May Have Killed the Cat but It Did Wonders F or Us
A Rolling Stone Gathers No Moss*; WE ALL SAY THEM, BUT WHAT DO THEY REALLY MEAN?
Frankie Missing So Give Hayley a Cheer; THE BELLY FROM THE TELLY
The Longhorns - University of Texas Press
The Parasite / Arthur Conan Doyle
The Secret Sharer, by Joseph Conrad
The Secret Sharer / Joseph Conrad
The House on the Fens, by Arthur Gask : Chapter 4. — that Cursed Dog, Larose
Curiosity Killed the Cat