This U.S. Department of Defense (DoD) handout photo shows the Massive Ordinance Air Blast (MOAB) weapon March 11, 2003 at Eglin Air Force Base, Florida. The 21,000 pound bomb was dropped from a C-130 Hercules aircraft at the Eglin test range March 11, 2003. According to the DoD the MOAB is the largest non-nuclear conventional weapon in existence.

Elon Musk’s new brain-machine interface startup, Neuralink, is just one of many recent announcements that have sparked imaginations about the potential of letting computers read our brains.