Which scientific product development failure resulted in a $1 billion write-off after discovering that the revolutionary technology couldn't reliably deliver accurate results as promised?

Product development in the scientific industry can be a risky business, with massive investments riding on successful outcomes. Throughout history, some seemingly promising scientific products have failed spectacularly despite extensive research and development. This trivia question focuses on one of the most notable scientific product development failures that had significant financial and reputational consequences. Test your knowledge about this infamous scientific product misstep!

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Theranos' Edison blood-testing device
Google Glass wearable technology
IBM's Watson for Oncology AI system
Pfizer's torcetrapib cholesterol medication