Monday 5 September 2016

Nuclear sharks live for 400 years

A wonderful paper in a recent edition of Science uses radiocarbon dating to show that the Greenland shark can live for up to 400 years - making it the longest lived vertebrate known. See: Eye lens radiocarbon reveals centuries of longevity in the Greenland shark (Somniosus microcephalus).

“Who would have expected that nuclear bombs [one day] could help to determine the life span of marine sharks?” The authors used measurements of 14C radiocarbon isotopes in eye lens nuclei to estimate life span of around 300 years, with the oldest animal approximately 392 years old. A complication in their analysis was the “bomb pulse”: the the pulse of carbon-14 produced by nuclear tests in the 1950s. This creates a spike in radiocarbon levels, however only the two smallest, and presumably youngest, of the 28 animals analysed had the high 14C levels associated with the bomb tests.

Why eye lens nuclei? It turns out that the lens is made from metabolically inert crystalline proteins, and the nucleus, which is formed during prenatal development, retains proteins synthesised at age 0.

No sex until you're 150: But this longevity comes at a price though, and for the Greenland shark the price is that sexual maturity is not reached for a very long time - around a female sharks 156th birthday!

Animals that live this long are rare, and horribly susceptible to Human activities; primarily fishing, shipping and pollution in the case of marine vertebrates. Most of animals used in this study came from several years of collecting dead  sharks, many of them accidentally ensnared when trawling for commercial catches.

1 comment:


    Stop asking for another chance, stop questioning what you could have done differently, and – most importantly – stop second-guessing your own self-worth. Once you Come Back To My Spell is performed, the balance of desire will shift and your lover will be begging you to take him or her back. This Love Spell Could Work For You!Bring back the good times. Think about the happiest time in your relationship, and i can make it happen again. You deserve to be happy.

    Are you looking for ultimate spells that works effectively same time on your problems, ranges from Love spells, marriage spells, and carrier related problems, witchcraft spells, charms, portion, talismans, magical oils / powders, protection, legal court cases, business prosperity spell, Gay and lesbian extreme love / attraction spells, women of the night Norton accruing powders and oil for extreme ecstasy and protection with in working ordeals.

    My powerful lottery spells, will bring you the huge wins, and jackpots you desire and need. I work my lottery spells, to bring great luck. The power of my lottery spells, works on you, so there are no special numbers needed to play, or certain patterns. Just play one ticket on the lottery of your choice, and the powerful lottery spell will handle the rest. Whether you play Power-ball, Mega Millions, daily drawings or sweepstakes. I have a powerful lottery spell, to help you. Working with my spirit guides, to clear bad luck, and infuse you with good luck and positive energy energy. The power of my lottery spells, brings luck, and wins fast. Clearing paths with-in the universe, for money and great luck to reach you. These powerful spell castings, will be successful in bringing the lottery wins, to change your life.





Note: only a member of this blog may post a comment.