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Ray tails have long been mysterious. Scientists may have finally discovered their function
Cownose rays (Rhinoptera bonasus) — like manta rays (Mobula birostris), eagle ... they are not used to kill prey or thwart predators. For centuries scientists have puzzled over the purpose ...
What Is Northrop Grumman's Underwater Manta Ray Drone?
Most people likely think of hunter-killer drone aircraft like the MQ-1 Predator or MQ-9 Reaper when ... underwater vehicle ...