In our last video contest "What is Nano?", you showed us that nano is a way of making things smaller, lighter and more efficient, making it possible to build better machines, solar cells, materials and radios. But another question remains: how exactly is "nano" going to impact both us and the world? We want you to think big about nano and show us how nano will address the challenges we face today.

• What can nano do for global security?
• What can nano do for the environment?
• What can nano do for sustainable energy?
• What can nano do for fighting disease?
• What can nano do for the products you use?
• What can nano do for YOU?

Congratulations to the winners of the 2nd ACS Nanotation NanoTube Video Contest!

First place was awarded to Natalie Herring et al. from the University of North Carolina, Charlotte for their video "NanoGirls", which detailed how nano solar cells will generate clean energy.

The runner-up was Wilfredo Yave from GKSS-Forschungszentrum who submitted "Nano Story", which described how nanoscience will solve the problem of global warming.

The winners were determined by voting from the general public, and were awarded $500 and $300, respectively for their entries.