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Sid Tafler

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What does cave art mean to you?

Stone Age art has fascinated people around the world since some of the first discoveries of cave paintings in France and Spain in the 19th century.
The recent Werner Herzog film "Cave of Forgotten Dreams," showcasing the spectacular panels of lions and horses at Chauvet, brought new attention to Paleolithic art.
If you haven't gazed into the deep past recently, do a web search for Lascaux, Chauvet or Altamira cave.

What do these arts forms mean to you?
Do you find them beautiful, primitive, artistically inspired, or something less?
Are these drawings art for art sake, an attempt by Paleolithic people to reproduce the world they experienced?
Or do they have some deep cosmic or spiritual significance?
Why did these people of 15,000 to 30,000 years ago often create these works in places that were difficult to access?
Were they trying to communicate with each other, access worlds beyond their own, or engage in hunting magic?
Or were they just enjoying themselves scratching and drawing on cave walls?

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  • May 14 2012: Answer what you know and solve for what you dont know. I am thinking the hands that are often painted on rock walls around the world can tell us more then previously thought but hey im just guessing and dont really have any formal anything. Feel free to use this idea I dont have any smart friends.

    Males and females generally have different finger proportions. In males, digit 2 is shorter than digit 4, but in females digit 2 is the same length or longer than digit 4. The second- to fourth-digit (2D:4D) ratio correlates with numerous sexually dimorphic behavioral and physiological conditions. Although correlational studies suggest that digit ratios reflect prenatal exposure to androgen, the developmental mechanism underlying sexually dimorphic digit development remains unknown. Here we report that the 2D:4D ratio in mice is controlled by the balance of androgen to estrogen signaling during a narrow window of digit development. Androgen receptor (AR) and estrogen receptor α (ER-α) activity is higher in digit 4 than in digit 2. Inactivation of AR decreases growth of digit 4, which causes a higher 2D:4D ratio, whereas inactivation of ER-α increases growth of digit 4, which leads to a lower 2D:4D ratio. We also show that addition of androgen has the same effect as inactivation of ER and that addition of estrogen mimics the reduction of AR. Androgen and estrogen differentially regulate the network of genes that controls chondrocyte proliferation, leading to differential growth of digit 4 in males and females. These studies identify previously undescribed molecular dimorphisms between male and female limb buds and provide experimental evidence that the digit ratio is a lifelong signature of prenatal hormonal exposure. Our results also suggest that the 2D:4D ratio can serve as an indicator of disrupted endocrine signaling during early development, which may aid in the identification of fetal origins of adult diseases.

    Zhengui Zheng and Martin J. Coh1

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