The world’s smallest working
steam engine has been built in Germany, according to a team of researchers.
The microscopic model was based on a 195-year-old design by the inventor Robert Stirling.
Changes included the replacement of the original pistons with a laser beam.
The physicists said they were
astonished by how efficiently the machine converted heat into power — but said it did
not run smoothly and had no practical use in its current form — via redwolf.newsvine.com