Amazon has the World’s Smallest Nee-Doh back in stock. See why shoppers are rushing to grab this tiny stress-relief toy.

Ronald Valentine's goal was to build the smallest operational diesel engine in the world and he was able to create a fully functional diesel engine.

Following his work on the world's smallest tiny house, YouTuber Levi Kelly is back with another exercise in extreme downsizing. This time, he’s created what he calls the world's smallest mobile tiny ...

The world’s tiniest pacemaker — smaller than a grain of rice — could help save babies born with heart defects, say scientists. The miniature device can be inserted with a syringe and dissolves after ...