Alexander Semenov and Alexander Semenov, and their works

One Alexander Semenov makes beautiful photographs of worms deep in the ocean. The other Alexander Senenov invents spectacular devices, one of which is a method to use the waste products produced by the crew of a battle tank, stuffing those waste products into explosive shells that the tank fires at an enemy. See if you can guess which one appears in this photo taken from an interview by Russia’s TOPSTV: