A new version of Ukraine's Shrike FPV attack drone can sink underwater, then re-emerge to carry out an attack. It might be the next generation of ambush drons.

We often think of submarines as fairly complex pieces of ... and maintaining neutral buoyancy while traveling underwater is a considerable engineering challenge. But it turns out that if you ...

It is fun to make a toy vehicle with Lego, but it is even more fun to make one that actually works. [PeterSripol] made two Lego submarines, and you can see them in the video below. There isn’t a ...