Russia's having problems with its newest ICBM. It drove away critical Ukrainian missile expertise.
Russia used to rely on Ukrainian expertise for its missile programs, but its actions in 2014 and beyond ended that ...
Interesting Engineering on MSN10h
Europe unveils mini nuclear system for moon rovers on extreme lunar missions
The RPS uses two Stirling engines to convert the heat generated by the decay of Plutonium-238 (Pu-238) into electricity.