What Is The Deadliest Machine Of All-Time? (Heavyweight Division, Round 2)

Megatron walked away with a victory over Mechagodzilla in Round 1 of the Heavyweight Division, but today he faces a formidable opponent from Marvel comics—the Sentinel.

Stay tuned for Round 3 of the Humanoid Division Battle later today. Cast your votes and feel free to suggest a new opponent in the comments.

This tournament poll of the world's deadliest robots was proposed to us by our friend PW Singer, author of Wired for War: The Robotics Revolution and Conflict in the 21st Century which we covered last March. Stay tuned for more of the tournament, more from Singer, and for more scary-ass robots wreaking havoc on fleshy humans and metallic adversaries alike.

Machines Behaving Deadly: A week exploring the sometimes difficult relationship between man and technology.