Chimp Tool Use in Kibale Forest: The Kanyawara Community

Chimpanzee populations throughout Africa differ in tool-using behavior, a likely example of animal culture. We exposed two Ugandan groups at Budongo and Kanyawara to an unfamiliar problem, honey trapped within a fallen log. We found that individuals relied on their cultural knowledge to solve this problem. The video shows how a Kanyawara chimpanzee manufactured a stick to access the honey. See the paper by Gruber et al., Current Biology 19(21), published online Oct. 22, 2009: www.cell.com ...
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Peer Review in 5 Minutes http://ff.im/cjgo8

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Piwi requires Armitage to silence transposons in the Drosophila germline

See paper by Malone et al., Cell. 2009 May 1;137(3):522-35. Epub 2009 Apr 23. www.cell.com Piwi protein is required to silence transposons in both the germline and somatic cells of the gonad. The RNA helicase Armitage, which is expressed in the germline, is required for Piwi localization and function in germline cells only. In Armitage mutant flies, Piwi-associated piRNAs corresponding to transposons regulated in the germline were lost. The movie shows Z-stacks of a Drosophila Armitage ...
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Women key to tackling climate change

26/11/2009 The study showed that empowering women can help climate change efforts.Women will be disproportionately affected by global climate change, according to a new report from the United Nations’ Population Fund (UNFPA).
The State of the World Population 2009 study highlights that as food and energy become harder to get hold of in developing nations, women [...]

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Great Ape Laughter

Gorilla: The first clip shows an adolescent gorilla being tickled on his foot. The gorilla responds with laughter, pulls his foot away, but then presents his foot in order to be tickled some more. Orangutan: The second clip shows a juvenile orangutan laughing and squeaking, while being tickled and played with. For related research, see the paper by Davila Ross et al., Current Biology 19(13). www.cell.com
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Antarctica may heat up dramatically as ozone hole repairs, warn scientists

2/12/2009 As blanket of ozone over southern pole seals up, temperatures on continent could soar by 3C, increasing sea level rise by   1.4m.Nasa graphic showing the extent of the ozone hole over Antarctica The hole in the Earth’s ozone layer has shielded Antarctica from the worst effects of global warming until now, according to the [...]

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منحوتات غبارية وسط سديم الوردة



ما السبب في تشكل منحوتات الغبار الكوني في قلب سديم الوردة؟ هذا السديم الذي يعرف أيضا باسم NGC 2237 يتميز ببهاء شكله العام الذي يشبه وردة متفتحة، كما أن إلقاء نظرة مقربة على بعض أجزائه كما هو الحال في الصورة أعلاه، يكشف لنا جمالا من نوع آخر، حيث تظهر الصورة كريات من الغبار الداكن والغازات التي تتآكل ببطىء بفعل أشعة الضوء الطاقوية والرياح المنبعثة من نجوم مجاورة ضخمة. من المرجح أن كريات السحب الجزيئية ستشكل نجوما وكواكب جديدة لو بقيت لحالها لمدة طويلة. تم التقاط هذه الصورة في ألوان محددة مرتبطة بالكبريت (الأحمر المظلل)، الهيدروجين (أخضر) والأكسجين (أزرق). يمتد سديم الوردة على رقعة تقارب 50 سنة ضوئية وهي تبعد عنا حوالي 4.500 سنة ضوئية، ويمكن رؤيتها باستعمال تلسكوب صغير باتجاه كوكبة وحيد القرن (Unicorn).

See original: Pixelpost منحوتات غبارية وسط سديم الوردة

Liked "Snakes on the Web" http://ff.im/7Nxyx

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