writes that ongoing experimental research determined that one of the secrets for the longevity of the Greenland shark, which can live between 250 and 500 years, is attributed to muscle metabolic activity. Ewan Camplisson, a PhD student at the University of Manchester, said that "we want to understand what adaptations they have that allow them to live so long."

While most species of animals on Earth change their metabolism when they age, scientists wanted to see if that's the case for the Greenland shark, which was believed to live this long thanks to a colder environment, as well as less activity, in general.

Comparing the metabolism of Greenland sharks of different ages, Camplisson's team determined that there was no significant variation in muscle metabolic activity for the creatures.

“This is quite different to most animals which tend to show some variation in their metabolic enzyme activity as they age. The results support our hypothesis that the Greenland shark does not show the same traditional signs of ageing as other animals", he explained.

Researchers now want to study more enzymes and types of tissue to determine what a shark's metabolic activity looks like, especially in the context of climate change.

"My ultimate goal is to protect the species and the best way to do this is to better understand them", the researcher added.

Additionally, by studying long-living vertebrates, we could get a better understanding of how we can live longer and healthier lives.