Nearly every nation has fallen short in its efforts to cut global emissions. And while world leaders are making new commitments to reduce carbon emissions, scientists say wildlife is already facing the consequences of climate change.
Nearly every nation has fallen short in its efforts to cut global emissions. And while world leaders are making new commitments to reduce carbon emissions, scientists say wildlife is already facing the consequences of climate change.
Nearly every nation has fallen short in its efforts to cut global emissions. And while world leaders are making new commitments to reduce carbon emissions, scientists say wildlife is already facing the consequences of climate change.
Nearly every nation has fallen short in its efforts to cut global emissions. And while world leaders are making new commitments to reduce carbon emissions, scientists say wildlife is already facing the consequences of climate change.
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The underwater chorus of killer whales or dolphins could contain secret military messages hidden in plain sound. Chinese researchers have recently published a series of studies describing how to disguise underwater communications as artificial dolphin clicks and killer whale songs, potentially allowing stealthy submarines or underwater drones to cryptically pass covert military communications between each other or a home base.
Mimicking marine mammal sounds to disguise military communication is a decades-old idea that has resurfaced. During the Cold War’s geopolitical rivalry between the United States and the Soviet Union, the US military’s Project Combo tested using recordings of whale and dolphin songs as the basis for secret code that might go unnoticed by enemy eavesdroppers. But the Chinese researchers’ efforts seem to have gone a step beyond, by using modern technology to create artificial whale and dolphin sounds from scratch rather than relying on pr