Nanoscale tweezers can perform single-molecule ‘biopsies’
Newly-developed "nano-tweezers" created by university researchers can for the first time extract single molecules from live cells without destroying them – solving a long-standing research problem.
![nanotweezer](http://www.leeds.ac.uk/images/resized/600x300-0-0-1-80-nanotweezer.png)