Microscale (2 of 2) (image) DOE/Argonne National Laboratory Caption These tiny "mushrooms" could be useful in new energy technologies. By tweaking the process, scientists can grow a variety of shapes and sizes. The scale bar shows 20 micrometers, which is about the size of a single bacterium. Credit Image by Alexey Snezhko and Igor Aronson, Argonne National Laboratory Usage Restrictions With the credit Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.