COLON EXAM WITHOUT THE SCOPE Your gut might be holding secrets your doctor desperately wants to know—without any need for a colonoscopy. Researchers at the University of Geneva have just pulled off something that could reshape cancer screening: they used artificial intelligence to decode the mind-boggling complexity of our gut bacteria, and their new stool test picked up 90% of colorectal cancers. All it takes is a sample—no tubes, no sedation, no day off work. Colorectal cancer is a big killer. It’s the second leading cause of cancer deaths around the world. The catch is, it’s also one of the most treatable cancers—if you catch it early. But most people dread colonoscopies. They’re expensive, they’re awkward, and they keep too many folks from getting screened at all. That’s where this new test comes in. The Geneva team used machine learning to build the most detailed map yet of the human gut microbiome, zooming in not just on species, but on the subtle differences within those s...