But living healthy doesn’t guarantee longevity either,
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, a new study of sea urchins suggests. Red sea urchins (Mesocentrotus franciscanus) live well past 100 years old in the wild,
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, while purple sea urchins (Strongylocentrotus purpuratus) make it to 50,
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. But variegated (also called “green”) sea urchins (Lytechinus variegatus) normally die after four years.
The difference in the species’ life spans might be due to different rates of aging,
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, thought aging researcher Andrea Bodnar at the Bermuda Institute of Ocean Sciences in St. George’s and developmental biologist James Coffman of the MDI Biological Laboratory in Salisbury Cove,
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, Maine. Instead,
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, they found, none of the species seem to age at all. Young and old members of each species are similar in their abilities to reproduce and to regenerate spines and tube feet,
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, the researchers reported online April 20 in Aging Cell. Even though the short-lived variegated urchins have no signs of slowing down, they still die. Why is a mystery,
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, Coffman says.

http://www.crimescenejournal.com/vanilla/activity

http://users.atw.hu/cr...rum_topic&topic=10514

http://www.b3nson.net/vanilla/activity

Algal toxin impairs sea lion memory By Sarah Zielinski ,
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, 13:49 PM December 16, 2015 SAN FRANCISCO – There is no locally caught crab on the menu here. The state of California warned earlier this year that the crustaceans may have high levels of domoic acid ,
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, a powerful neurotoxin, and should not be eaten. Domoic acid is produced by algae in the genus Pseudo-nitzschia ,
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, and there’s a huge bloom of them off the coast. The toxin accumulates in creatures that eat the algae, such as crabs, and on up the food chain. A person who eats one of these critters can get a potentially deadly... Source URL:

Psychology got rocked last year by a report that many of the field’s published results vanish in repeat experiments. But that disturbing study sounded a false alarm,
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, a controversial analysis finds.
The original investigation of 100 studies contained key errors,
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, contend Harvard University psychologist Daniel Gilbert and his colleagues. After correcting for those errors, the effects reported in 85 of those studies appeared in replications conducted by different researchers. So an initial conclusion that only 35 studies generated repeatable findings was a gross underestimate,
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, Gilbert’s team reports in the March 4 Science,
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.
“There’s no evidence for a replication crisis in psychology,
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,” Gilbert says.
Psychologist Brian Nosek of the University of Virginia in Charlottesville

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