Oceanography
How deep is the ocean?
The average depth of the ocean is about 3,700m. The deepest point in the ocean known today is Challenger Deep in the Mariana Trench with a depth of about 10,935m (nearly…
Sonar
Browse ScienceInfo articles and explainers related to Sonar.
Topic archive
Articles about Sonar
19 published items.
Oceanography
Researchers learn the language of... whales and sperm whales
For the first time in the world, researchers had a 'conversation' with a whale. Now their goal is to try to find out what it's actually saying.
1001 mystery
Object suspected of being Amelia Earhart's missing plane for 87 years
An ocean exploration company in September 2023 shared a sonar image of an airplane-shaped object suspected to be the Lockheed 10-E Electra of legendary female pilot Amel…
Oceanography
Why does the US Navy listen to the sound of giant groupers and crayfish?
The US is testing technology that uses natural noise to locate threats on the seabed as an alternative to military sonar.
Archeology
Researchers use sound waves to find a town lost for 650 years
The researchers hope the high-resolution sonar system can help locate the medieval town of Ravenser Odd, which sank under the North Sea in the mid-14th century.
Discover science
A giant 2,000-year-old 'ghost ship' comes to life with sound waves
Using sonar technology to explore the seabed by sound waves, scientists have discovered a shadowy figure like a ghost ship up to 34 m long, hidden in deep Mediterranean…
Discover science
American physicists have created an
Scientists have created dozens of structures that reflect or transmit sound waves through them perfectly, but they all only work in the atmosphere.
Discover science
Great progress: Vietnam built 'torpedo'
Vietnam is making great progress in the research of manufacturing underwater weapons, especially anti-submarine torpedoes.
1001 mystery
Is the UFO under the Baltic Sea just a rock?
Based on the analysis of rock samples taken from strange objects with a diameter of more than 60m and rising from the sea floor near 4m under the Baltic Sea, Swedish geo…
Oceanography
Whales die mass, he suspects due to Russian submarines
Newsweek reported on September 12 that the bodies of 43 Cuvier bighead whales were discovered in the coast of five islands in western Scotland in just over a month.
Oceanography
Secrets of the sea: Sounds and sea creatures
Underwater sounds are important for animals. It allows them to navigate, hear the sounds of approaching predators and prey, and is a way of communicating with others. Th…
Archeology
Found the wreck sunk for more than 100 years
Researchers have recently found the body of a ship sunk since the 19th century, using an underwater locator.
Animal world
Ultrasound 'magic' of dolphins can improve current medical techniques
Since the 1960s, scientific studies have shown us that marine mammals, such as dolphins, communicate with each other by sound waves.
Animal world
Interesting discovery of special sleep of dolphins
Unlike terrestrial mammals, dolphins only sleep with half their brains while the other half is awake. C
Science story
Before the radar, how did people detect planes?
Today, it is easier to detect the movement of aircraft thanks to the help of radar systems. However, before the radar technology, how do people detect the movement of ai…