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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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Vampire Bat

Its got a face only a mother could love and invokes fear in most! So do these scary little creatures actually drink your blood? Yes. Yes they do. Its a dietary trait called hematophagy and the Vampire Bat solely feeds on the blood of mammals. There are three species of Vampire Bat in total; The common Vampire Bat (Desmodus Rotundus), The hairy-legged Vampire Bat (Diphylla Ecaudata) and the white winged Vampire Bat (Diaemus Youngi) and are found throughout the Americas ranging from Mexico, Brazil, Chile and Argentina. The Vampire Bat’s favourite place to dwell is in dark places such as caves or tree hollows, depending on the size of the colony which can range anywhere from a few individuals to hundreds.

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Vampire Trees This is an image of the branch of the rare albino redwood tree. They completely lack the green pigment chlorophyll. Albinism is a genetic mutation that prevents cells from producing pigment. It’s normally not a big deal. But albinism in plants means that they can’t utilise chlorophyll to photosynthesise. Instead, they suck the life from surrounding trees! They remain attached to the roots of their healthy, normal, parent trees and survive by sucking energy from them. Only about 25 of these trees are known to exist around the world, eight of which are at Henry Cowell State Park in California. This park has the largest known concentration of albino redwoods anywhere branding it the epicentre for a scientific mystery. -Jean Image courtesy of wikimedia commons

Source: facebook.com
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Vampires?

For the past few years, books, television, and movies have been filled with vampires (and werewolves). Sexy, attractive, and misunderstood, the modern renditions of vampires have captured the imaginations of millions of fans. But myths of more terrifying versions of these predators are found in some form in almost every culture on Earth and go back thousands of years.

Some attribute the rise of vampire legends to ancient Egypt, in the form of ghouls or demons brought from the netherworld by sorcerers. People today are most familiar with the European version of the vampire, thought by some to have originated with Bram Stoker’s book, “Dracula,” loosely modeled on Romania’s 15th century Prince Vlad Tepes, (a.k.a. Vlad the Impaler). However, ancient Greece, India, China, Arabia, and many other cultures all have their own legends of vampires. In some places, these blood-drinking monsters were believed to be revenants, or in popular terminology: undead. Most educated people will tell you that vampires don’t exist, that they’re only stories. How, then, do we explain the cultural pervasiveness of the tales?

Hippocrates is cited by some as the first to recognize the symptoms of the disease now known as “porphyria”, but it was not identified as being associated with the porphyrin pigments in the blood until pioneering German biochemist Felix Hoppe-Seyer did so in 1871. The name “porphyria” (from the Greek “porphyrus” or purple) is attributed to Dr. B.J. Stokvis, who described the clinical syndrome in 1889.

Many forms of the disease exist, but all stem from faults in the human body’s production of hemes, which carry oxygen in our blood. Porphyrins are precursors to the process of making hemes, such as hemoglobin. But in some people, their bodies have a deficiency (sometimes inherited and sometimes acquired) of the enzymes needed to transform the porphyrins, leading to a toxic buildup of the substances in their blood. Symptoms may include trances, seizures, hallucinations, coma, and photosensitivity, an extreme reaction to light. Tales of destroying vampires by exposing them to light might well have derived from this aspect of the disease, which causes chronic blistering and burns from the touch of the sun on their skin. Sufferers of this form of the disease often are able to only go out at night.

Imagine an innocent person who has fallen into a coma and is presumed to be dead. They awaken alone, perhaps already enshrouded. Open sores and skin erosion would have loaned themselves to the impression of something that has risen from the grave. Some forms of the disease cause even those inflicted to become extremely hirsute (really hairy), especially around the face (the origin of werewolves perhaps??).

Superstitious people prevented suspected vampires from rising by staking them to their graves. In 2013, two ancient skeletons were found in Bulgaria with iron rods impaling their chests, believed by the archeologists who discovered them to have been people accused of vampirism. Another body, found in a mass grave in Venice, Italy, had a brick shoved into its mouth. A common folk belief from the time period was that vampires could chew their way out of their shrouds to seek victims. Decapitating them and filling their mouths with garlic or a brick were thought to prevent this.

There is no cure for the rare disease, but in many cases, some relief from symptoms of porphyria can be attained by blood or heme transfusions. The heme pigment is able to survive digestion and be absorbed from the intestines. Although there is no evidence that ingesting blood can treat porphyria, speculation exists that in ancient times, when people believed disease to be caused by imbalances in the four “humours” (yellow bile, black bile, blood, and phlegm) and used leeches to remove blood, people might also have drunk blood to alleviate their suffering.

Images

http://dailym.ai/207onuC

Sources

http://www.scientificamerican.com/article/born-to-the-purple-the-st/ http://www.livescience.com/24374-vampires-real-history.html http://bit.ly/1PNYqN6 https://en.wikipedia.org/wiki/Vampire_folklore_by_region https://en.wikipedia.org/wiki/Porphyria https://www.nlm.nih.gov/exhibition/shakespeare/fourhumors.html http://bit.ly/207mJcl

Source: facebook.com
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Vampire squid fossil!

What is #cephalopodweek at a geology page without a vampire squid fossil? I’m not sure but since today is also #fossilfriday let’s make sure that doesn’t happen.

The Vampire Squid of today is a species with a name that sounds much more intimidating than it actually is. It is a deep-sea creature, found only deep in the oceans where no sunlight penetrates. It is similar to other cephalopods such as squid and octopus but it is distinct from both, with differences driven by the environment where it lives.

Its name originates from the webbing between its arms that was thought to resemble a cape, dark skin with little pigment, and eyes that can appear red under some lighting conditions. However, unlike the octopus that can be found at shallower ocean levels, the modern vampire squid has not been seen to eat live prey, only debris that sinks from shallower ocean levels.

The modern Vampire Squid is classified as Vampyroteuthis infernalis; this fossil one is considered Vampyronassa rhodanica; related, but slightly different. Many of the features are the same, implying that even though these rocks are Jurassic in age, the lifestyle of this creature was much the same as it is today.

The bodies of the Vampire Squid today are close to neutrally buoyant in the ocean, so they can hang out at a given level while spending almost no energy. If threatened, they are able to accelerate themselves by using fins to propel themselves and can release a type of bioluminescent mucus that distracts the threat while the organism swims away. Some of the propulsion parts on the fossilized version are longer than on the modern version, maybe suggesting that it was a better swimmer or lived in an environment where rapid propulsion was more needed.

Also caught in this limestone along with the squid are a fossil Jurassic shrimp (to the left) and a bivalve (above it).

-JBB

Image credit: http://bit.ly/1K784WW

Read more: http://www.prehistoric-wildlife.com/species/v/vampyronassa.html http://eol.org/pages/10511140/details http://www.sci-news.com/biology/article00623.html http://www.thecephalopodpage.org/vampy.php

Source: facebook.com
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Vampire Trees This is an image of the branch of the rare albino redwood tree. They completely lack the green pigment chlorophyll. Albinism is a genetic mutation that prevents cells from producing pigment. It’s normally not a big deal. But albinism in plants means that they can’t utilise chlorophyll to photosynthesise. Instead, they suck the life from surrounding trees! They remain attached to the roots of their healthy, normal, parent trees and survive by sucking energy from them. Only about 25 of these trees are known to exist around the world, eight of which are at Henry Cowell State Park in California. This park has the largest known concentration of albino redwoods anywhere branding it the epicentre for a scientific mystery. -Jean Image courtesy of wikimedia commons

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