How often does ChatGPT push misinformation? Researchers found that one of the most popular generative-AI tools agreed with false statements up to one-quarter of the time.

A new study detailing this phenomenon includes data from water samples gathered over 20 years to create the largest metagenomic time series of a natural system.

The study, published Sunday in the journal JAMA, found that about 90 percent of the time the blood test correctly identified whether patients with memory problems had Alzheimer’s.