21:18
Veritasium
The CIA's new tech doesn't make sense
A New York Post story claimed the CIA pulled off something out of a Tom Clancy novel. A downed American weapon system officer was hiding, injured, deep in Iranian mountains, and the agency supposedly found him by detecting the faint magnetic field of his beating heart from kilometers away with a device they nicknamed Ghost Murmur. Veritasium takes that claim apart bit by bit. The heart really does make a magnetic field, synthetic diamonds really can sense magnetic fields at room temperature, and the CIA really does use both deception and exotic sensors. But when you run the numbers, the distance kills it.
