Smallest remote controlled robot:

[Raccoon1010]

‘Crab’ Is Smallest Remote-Controlled Walking Robot - Videos from The Weather Channel | weather.com

Researchers at Northwestern University created a tiny crab robot that they can move around with lasers.

 

[bluedragon]

Years and years ago Japan came out and declared they had created the World's smallest drill bit. Germany took a look at their claim and borrowed a drill bit. Germany sent back the world's smallest drill bit with a note. "Find the new hole."