منابع مشابه
Dealing with Futile Fears
بدون ترس شانس کمتری برای رسیدن به دوران تکاملی داریم. ترس منطقی به ما می گوید که از چه چیز پرهیز کنیم، به ما کمک می کند که با مشکلات روبرو شویم و ما را در مقابل خطرات حقبقی محافظت می کند. در طرف دیگر آن نوع ترس هائی که از مقوله ترسهای مرضی است، غیرمنطقی می باشد و آثار فیزیکی و روحی بی شماری را باعث می گردد.
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37 per cent of all human-induced methane, which is largely produced by the digestive system of ruminants, and 64 per cent of ammonia, which contributes significantly to acid rain. Livestock now use 30 per cent of the earth’s entire land surface, the report says, mostly on permanent pasture but also including 33 per cent of the global arable land — used to produce feed for livestock, the report ...
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Antarctic summer saw the largest ship ever visit Antarctica: the Star Princess with 3,500 passengers and crew sailed amongst humpback whales and colonies of gentoo penguins. But, at a meeting this month in New Zealand of the treaty nations, several regulations are expected to be tightened for the southern high latitudes with knock-on effects for the Arctic. The meeting may also finally prohibit...
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reached so far to the south-east of Africa as Natal, seems to me extraordinary”, wrote Witherby. The primary purpose of bird ringing was to map bird migration, and much information about migration routes and winter and summer destinations has been obtained over the past century. Ringing is still based on the original principles but techniques have been refined and improved. And researchers have...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/338288a0