Nuclear bomb tests help to expose a giant fish’s true age - Nature
2020年4月7日 · Using the radioactive carbon spewed into the atmosphere by cold war-era nuclear-bomb tests, scientists have developed a precise method for pinning down the age of whale sharks, giant fish that some...
How Old are Whale Sharks? Nuclear Bomb Legacy Reveals Their …
2020年4月4日 · One whale shark was an estimated 50 years old when it died, making it the oldest known of its kind. Another shark was an estimated 35 years old. The study in the journal Frontiers in Marine Science used a measure of lingering radioactivity (radiocarbon dating) from nuclear explosions to estimate shark ages, and it could help ensure the survival ...
Atomic bomb dating reveals true age of whale sharks
2020年4月8日 · One of the whale sharks, a 10-meter-long female that was found stranded in Pakistan in 2012, was estimated to be 50 years old. Previous methods, such as estimating their age by comparing an individual's length at different times using photographs, have estimated that whale sharks live up to 130 years , but bomb dating is the most accurate ...
Nuclear bomb tests helped determine the ages of whale sharks for ... - CNN
2020年4月7日 · New findings end those guesses: A coterie of international researchers confirmed the ages of two whale sharks for the first time – by sampling the carbon in vertebrae, left over from nuclear bomb...
Age of whale sharks accurately estimated thanks to Cold War …
Atomic bomb tests conducted during the Cold War have helped scientists accurately determine the age of whale sharks for the first time. These findings will help with the conservation of the species, which is currently classified as endangered.
Whale sharks may live up to a century, Cold War bomb dating reveals
2020年4月6日 · From 1955 to 1963, atomic bomb testing in the United States and other countries doubled the amount of carbon-14 naturally in Earth’s atmosphere. That excess was absorbed into the ocean and taken...
Researchers Calculated a Whale Shark’s Age Based on Cold War …
2020年4月8日 · About 20 years ago, study co-author Steven Campana of the University of Iceland developed a method to figure out shark ages using the carbon-14 in their cartilage skeletons. Using this method,...
Cold War nuclear bomb tests reveal true age of whale sharks
2020年4月6日 · Atomic bomb tests conducted during the Cold War have helped scientists for the first time correctly determine the age of whale sharks. The discovery, published in the journal Frontiers in Marine Science, will help ensure the survival of the species – the largest fish in the world – which is classified as endangered.
Atom bomb isotopes reveal true age of whale sharks for the first time
2020年4月6日 · A new study, however, has demonstrated how the atomic bomb tests from the Cold War era could help fill in some of the blanks, with scientists using nuclear isotopes to measure the age of a whale...
Cold War nuclear bomb tests reveal true age of whale sharks
2020年4月6日 · Atomic bomb tests conducted during the Cold War have helped scientists for the first time correctly determine the age of whale sharks. The discovery, published in the journal …