Category: Images

• colourful dahlia by C-Smooth http://flic.kr/p/A2rMkG

  2015-11-01

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  via Tumblr http://bit.ly/1M5gs7w

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• A photo for a book project in evolution…the beautiful eyes of Bella. The earliest human ancestors came from the continent of Africa, as #primates adapted and then branched off into many different species that eventually became our modern day human beings appeared. Since the equator cuts directly through the continent of Africa, the countries there receive almost direct sunlight, with ultraviolet rays, and the warm temperatures it brings pressured for the natural selection of dark skin color. Pigments, like melanin in the skin, protect against these harmful rays of the sun. Individuals with darker skin live longer and they would reproduce and pass down the dark skinned genes to their offspring. #Naturalselection for the lighter eye colors are linked to the relaxation of selection for darker skin tones. As human ancestors began to migrate to various places around the world, the pressure for selection of dark skin color was not as intense. These much higher latitudes afforded different seasons with much less direct sunlight , like near the equator, the selection pressure was no longer as intense, genes were more likely to #mutate. The color of human #eyes is not dictated by a single gen many it of the other traits. It is instead considered a polygenic trait, meaning there are several different genes on various chromosomes that carry information about what eye color an individual should possess. These genes, when expressed, then blend together to make various shades of different colors. Relaxed selection for dark eye color also allowed more mutations to take hold. This created even more alleles available to combine together in the gene pool to create different eye colors. #Sexualselection may also explain some of the different eye colors that have popped up over time. Mating, in humans, tends to be non-random and as a species, we are able to choose our mates based on desirable characteristics. Some individuals may find one eye color much more appealing over another and choose a mate with that color of eyes. Then, those genes are passed down to their offspring and continue to be available in the gene pool. @robertclarkphoto @thephotosociety by natgeo http://ift.tt/1GHJNYT

  2015-11-01

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  via Tumblr http://bit.ly/1MrAbh2

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• meow🇺🇸irl via /r/MEOW_IRL http://bit.ly/1OhuZTz

  2015-11-01

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  via Tumblr http://bit.ly/1M5ejc6

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• Photograph by @paulnicklen // Ochre Stars among the anemones. With @cristinamittermeier and @sea_legacy #starfish #nature #wildlife #smile #love #beauty #picoftheday #photooftheday by natgeo http://ift.tt/1ifXkLC

  2015-11-01

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  via Tumblr http://bit.ly/1GHcCoC

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• Autumn at Chatsworth, Derbyshire, England [OC] [3264×2448] via /r/EarthPorn http://bit.ly/1NisE9n

  2015-11-01

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  via Tumblr http://bit.ly/1kkNQA5

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• We will just sleep here till you let us out via /r/cats http://bit.ly/1PZmjBx

  2015-11-01

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  via Tumblr http://bit.ly/1M5bHLt

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• MEOW_IRL via /r/MEOW_IRL http://bit.ly/1Q43Y5b

  2015-11-01

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  via Tumblr http://bit.ly/1KR1pN4

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• Photo by @daviddoubilet Tucked in toxic tentacles. A pink clownfish peers out at me, safe within the folds of its host anemone in #KimbeBay #PapuaNewGuinea. Clownfish, also called anemone fish, are immune to the toxins produced by its home. I am a confirmed clownfish addict. I cant swim past them without stopping to check what species it is and to look for eggs ready to hatch. Kimbe Bay is the site one of the longest running research studies on anemones and clownfish and their importance as indicator species to coral reef health. I will be posting a series of clownfish from reefs around the world this week as we present #NGLive Coral Kingdoms and Empires of Ice at the Amoss Center Bel air Maryland Oct 29 with @jenniferhayesig @thephotosociety #nemo #CoralTriangle #CoralReef by natgeo http://ift.tt/1kPPV7J

  2015-11-01

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  via Tumblr http://bit.ly/1Q02olW

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• Smokies by shalabh_sharma7 http://flic.kr/p/A2vmuk

  2015-11-01

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  via Tumblr http://bit.ly/1KQYVy8

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• Painted Hills and a Boulder-Mounted Monastery in Ladakh region, India [3964×2633] [OC] via /r/EarthPorn http://bit.ly/1RHs04r

  2015-11-01

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  via Tumblr http://bit.ly/1N5rUzV

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• Huracán 2000 by ces@r_ http://flic.kr/p/A2QgQo

  2015-11-01

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  via Tumblr http://bit.ly/1MAJtO2

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• meow_irl via /r/MEOW_IRL http://bit.ly/1WrYelF

  2015-11-01

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  via Tumblr http://bit.ly/1kkJIzV

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• Mt. Rainier, Washington (OC) [3648×2736] via /r/EarthPorn http://bit.ly/1KQxgxi

  2015-11-01

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  via Tumblr http://bit.ly/1HlEjOq

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• When the sunset comes by Sergio Gold http://flic.kr/p/AichYP

  2015-11-01

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  via Tumblr http://bit.ly/1RHCMHR

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