For years, assistance dogs have been used to detect low blood sugar levels in their diabetic owners and warn of an impending hypoglycemia attack. Scientists have finally figured out how dogs are able to accomplish this feat—an insight that could lead to new medical sensors.
Cone snails are known for their venom. Upwards of fifteen people have died of it. One snail, Conus geographus, doesn't even have to sting to kill its prey. And scientists have found out why.