Caturo: The smallest concentric tube robot ever made

Physicists at the Technical University of Denmark (DTU) are bringing the Christmas cheer by using a 3D nanolithography tool called the Nanofrazor to cut the smallest record ever. The tune they "recorded," in full stereo no less: the first 25 seconds of "Rocking Around the Christmas Tree

Physicists Have Achieved The Smallest Measurement Yet of a Ghost Particle's Mass

Which is the largest continent? The smallest?