Researchers have invented nano-optical tweezers capable of trapping and moving an individual nano-object in three dimensions using only the force of light. Using this approach, they have demonstrated ...

Cells are minute—typically too small to be seen by the human eye. Even so, the cellular world encompasses a range of scales, from roughly a tenth of a nanometer (10 −10 m) to a millimeter (10 −3 m) or ...

The brain organizes objects based on their physical size, with a specific region of the brain reserved for recognizing large objects and another reserved for small objects, according to a new article.