Science
Scientists at work: New recordings of ultrasonic seal calls hint at sonar-like abilities – The Conversation US
Microphones on the seafloor recorded life under the Antarctic ice for two years – inadvertently catching seal trills and chirps that are above the range of human…

Divers inside the shelter hut prepare to drop into the ocean.McMurdo Oceanographic Observatory, CC BY-ND
Im sitting on the edge of a hole drilled through 15 feet of Antarctic sea ice, about to descend into the frigid ocean of the southernmost dive site in the world. I wear nearly 100 pounds of gear a drysuit and gloves, multiple layers of insulation, scuba tank and regulators, lights, equipment, fins and over 40 pounds of lead to counteract all that added buoyancy.
I do a final check with my dive…
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