Tip:
Highlight text to annotate it
X
In World War II,
the U.S. Navy was chasing the Japanese submarines.
But they couldn't find them. Instead, the strange sounds came from somewhere.
The source of the sounds was...
the whales.
The Whales, The Sound Magicians
The whale's singing sounds were considered to be unfamiliar
By the way, are there singing whales around the Korean peninsula?
The minke whales live in the sea around Korea, China, Japan, and Russia.
Because a minke whale always forages silently alone,
it is called a solitary whale.
In 1996,
Daniel Costa and his team discovered the minke whales' singing sounds.
Why do minke whales sing?
Whales are sound magicians that can see with sound.
When the light is gone, there is only darkness in the deep sea.
Sound gives more accurate information than light.
Whales judge the distance by analyzinig the sound reflected back.
"It's close."
"It's far."
In the deep ocean, it is a mysterious world of sound.
Humans also see the deep sea by using sound.
A bathyscaphe measures submarine topography with echo sounding.
Echo sounding: The way to determine the depth of water
by measuring the time it takes for the supersonic waves to return
In the deep ocean, humans can meet whales by using sound.