Because they had run out of satellite tags they're expensive after taking biological samples, Hammerschlag attached a simple ID tag to the bull shark.

MSN: What a catch: Giant bull shark surprises researchers

But its 16 authors, led by Michael Ladisch, a biological engineer at Purdue University, reckon that high-tech chow will, within the next 25 years, protect troops from attack by biological weapons, insulate them against cold weather and even make them visible to their commanders by satellite.

ECONOMIST: A new report speculates on army rations of the future