By ALEXA ROBLES-GIL Giant manta rays are otherworldly leviathans gliding through the world’s seas on massive wings. But even though they are the largest ray species in the world, a fundamental part of their lives remains obscure: where they give birth. “The big unknown for us now is where females go to pup and where these pups hang out,” said Joshua Stewart, a marine ecologist at Oregon State University. Now a team of scientists in Mexico has reported the first use of underwater ultrasound…
