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The Earth Story

@earthstory / earthstory.tumblr.com

This is the blog homepage of the Facebook group "The Earth Story" (Click here to visit our Facebook group). “The Earth Story” are group of volunteers with backgrounds throughout the Earth Sciences. We cover all Earth sciences - oceanography, climatology, geology, geophysics and much, much more. Our articles combine the latest research, stunning photography, and basic knowledge of geosciences, and are written for everyone!
We hope you find us to be a unique home for learning about the Earth sciences, and we hope you enjoy!
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An ocean mystery These samples recently created an interesting story. In 2014, researchers got round to examining the specimens from a 1986 dredging expedition between 400 and 1000 metres down, and found these preserved specimens in the collection. These mushroom-shaped organisms defied classification and were called Dendrogramma due to branching features observed in their caps. Because these were only preserved specimens, scientists couldn't conduct a DNA analysis to determine their origin, but in 2015 a research study collected 85 new specimens that could be used for genetic analysis. They were found to be related to the Siphonophores, a class of jellyfish that includes the Portugese Man-of-War. Loz Image credit: Plos One https://www.bbc.com/news/world-australia-36457841 http://www.theguardian.com/environment/2014/sep/04/two-unclassifiable-species-found-off-australian-coast Original article, free access: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0102976

Source: facebook.com
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natgeo
Video by Michaela Skovranova
@mishkusk
| A young Green Turtle is enjoying a jellyfish meal off the East Coast of Australia.
Juvenile green turtles are omnivores and will happily feed on almost anything, jellyfish included. As they grow older their diet tends to shift towards consuming seagrass and algae. Because sea turtles are reptiles, they are much less likely to suffer from the adverse effects of the jellyfish stinging cells. Unfortunately for turtles, it is often hard to distinguish a piece of floating plastic from a jellyfish. Research has shown that a turtle has a 22% chance of dying if it eats just one piece of plastic. Us humans have excellent opportunity to help - we can opt for plastic-free alternatives, shop consciously or even collect a few pieces of debris on our walk home. Drains and rivers lead to the ocean, therefore, no matter where in the world you are every little bit counts.
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  • natgeo Video by @joelsartore | During moonlit nights, off the coasts of southern Japan, Brazil and Argentina, you might get lucky enough to see a flower hat jelly like this one emit fluorescent lights from its tentacles. These invertebrates have no brain, heart or real eyes and yet, incredibly, they are predatory animals. To hunt, these jellies will hide amongst the seagrass, waiting for an unsuspecting fish to swim by. By stinging their prey with their venomous tentacles, they’re able to subdue it and will consume entire fish at a time. While a sting from this jelly will definitely hurt and likely leave a rash, it is not fatal to humans. This flower hat jelly was photographed at @AquariumPacific, where they are displayed under moonlight conditions to highlight their fluorescence. For a portrait of this beautiful jelly, follow @joelsartore.
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natgeowild Video by @filipe_deandrade | While filming jaguars and olive ridley sea turtles in Costa Rica, I had to completely immerse myself in the lifecycle of both animals. Two iconic species revered and protected by the locals. Not a bad gig. Getting close to turtles on land is cake. I would just walk up to them, keep a respectable distance, wait for the females to start laying eggs and then roll camera. In the water though...totally different. Their lethargic demeanor on land washes away in the ocean. They can ghost you in an instant and getting close enough to give them a high 5 is out of the question. But this interaction was completely instigated by the turtle. I was dumbfounded when she swam right up to me and started to chomp on my camera housing. Then it hit me, she thinks my camera is a jellyfish. Sea turtles have specialized digestive tracks which keeps them safe against jellyfish toxins. How WILD is that? It also showed me how easy it is for this majestic creature to confuse something man-made with something natural. So don’t litter the oceans. 
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theocean A marine biologist captured footage of a green sea turtle enjoying a stinging meal - a jellyfish. Jellyfish paralyze prey using neurotoxins in their tentacles, but the turtle does not seem to be affected. It closes its eyes and uses its flipper as a shield from the jellyfish’s stinging tentacles. Green sea turtles are endangered. Their main threat is overexploitation of eggs from the beaches they are laid on. Green sea turtles are predominately herbivorous, but juveniles have been known to feed on jellyfish.
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natgeowild A marine biologist captured footage of a green sea turtle enjoying a stinging meal - a jellyfish. Jellyfish paralyze prey using neurotoxins in their tentacles, but the turtle does not seem to be affected. It closes its eyes and uses its flipper as a shield from the jellyfish’s stinging tentacles. Green sea turtles are endangered. Their main threat is overexploitation of eggs from the beaches they are laid on. Green sea turtles are predominately herbivorous, but juveniles have been known to feed on jellyfish.
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