> With the help of a mathematical model that linked size with age, they estimated that one sixteen-foot female was at least two hundred and seventy-two years old, and possibly as much as five hundred and twelve years old. Because it is difficult to establish background carbon-14 levels in the ocean, and because Nielsen and his colleagues didn’t know which part of the ocean the sharks had been born in, the figure was inexact. Still, it firmly established Greenland sharks as the longest-living vertebrates on Earth. In theory, the biggest ones could be nearly six centuries old.
>A Greenland shark's heart beats once every 10 seconds (6 times per minute).
More fuel for the fire for the theory that we all get about the same number of heartbeats in a lifetime. Well, I'm off to do my weekly long run to lower my resting heart rate during the week.
Good news- I still have a much lower resting heart rate from running years ago- I haven't run in about 12 years due to compounding injuries- but the benefits are still there. It's finally starting to go up to normal, but it used to freak nurses and doctors when they'd measure it.
I feel like gains from running stay with you a long time also. Once I was a runner, it was so much easier to go back to running five miles easily if I ever quit and went back to it. I think there is some body and muscle memory that remains.
I think I've read that true endurance and strength of your heart is built running over one hour at a time and in my experience that seems true. Our bodies are so lazy and don't make changes until they absolutely have to. I run 7 miles every Sunday or so. I based that number on that and this paper which shows mortality vs. distance run per week. People that run too much have mortality like a sedentary person!
“For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much — the wheel, New York, wars and so on — whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man — for precisely the same reasons.”
― Douglas Adams, The Hitchhiker’s Guide to the Galaxy
> With the help of a mathematical model that linked size with age, they estimated that one sixteen-foot female was at least two hundred and seventy-two years old, and possibly as much as five hundred and twelve years old. Because it is difficult to establish background carbon-14 levels in the ocean, and because Nielsen and his colleagues didn’t know which part of the ocean the sharks had been born in, the figure was inexact. Still, it firmly established Greenland sharks as the longest-living vertebrates on Earth. In theory, the biggest ones could be nearly six centuries old.