Afraid your fish is too fishy? Smart sensors might save your nose

Technology Engineering Afraid your fish is too fishy? Microneedles can tell when things start getting rancid long before we notice smells. Breakthroughs, discoveries, and DIY tips sent every weekday. A new biosensor made out of needles most commonly seen in dermatology clinics and medspas could make the fresh fish " smell test " seem antiquated. For as long as humans have eaten fish, we've identified rot or spoilage by looking for a handful of physical signs .