A little bit of explosives technology for today. The object in the picture below is a unique kind of explosive. It was typically used for clearing barbed wire fences in the battlefield. A series of these would be joined together, slid under the wire, and then the whole thing would be detonated. All this had to be done under fire, of course. What it is?

Answered by: nihit , udupendra , Dhruva , fsdgdsg , bobo , bs , Ganesh Prasad , Varun.M , prasanth , 2ndratequizzer , rajeshvj , Swetha , jayanth , sridhar , iamniks , yaksha , Prasad  and Biki.

Answer:Not much fundaeing required, this is the Bangalore Torpedo.

The tech connection: anything that blows stuff up is cool :-)

(Thanks for covering for me yesterday, Devadutta)