Dear MEL Topic Readers,
Sharks evolved over millions of years as an apex predator, yet are no match for humans
Every living thing plays a role in the food chain and Earth's ecosystems. Sharks are on the top in the marine food chain only after orcas and whales. Though they scare humans, they are more scared by humans. Indeed, humans are direct predators of sharks. Except for their shape and jaws, we know so little about this unique marine creature. For example, it is estimated that some shark species live 20 to 40 years while others like Greenland sharks live over 100 years. Also, while most shark species are coldblooded, some are found to be warm-blooded, which can regulate their own body temperatures and swim faster. What makes it difficult for researchers to learn about sharks is that they mostly roan in the deep sea, hundred meters below the ocean surface. Unfortunately, like other large animals like elephants, whales, and gorillas, their population is declining rapidly. In fact, over three-quarters of the species are now threatened with extinction. Since sharks have been in the oceans for hundreds of millions of years, they had managed to survive until humans conquered the oceans.
Enjoy reading the article and learn about sharks.
https://edition.cnn.com/2021/07/11/us/5-shark-week-facts-scn/index.html
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