When your steam engine build requires multiple microscopes, including those of the scanning electron variety, you know you’re building something really, really tiny. All of the usual tiny ...

The Kew Bridge Steam Museum in London has the largest working Cornish Steam Engine in the World. It was actually built for the site to pump water to West London and started work on the 30th May 1846.

As the liquid turns to gaseous nitrogen at around -196 C, [The Action Lab] figured that it could be used to propel a simple steam engine at room temperature. Testing this out had amusing results.