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NASA Rover Finds Evidence That Mars Once Had Lakes

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Mars' massive Mount Sharp may have formed billions of years ago as water carried sand and silt into the center of a large crater. ASA/JPL-Caltech/MSSS Mars is cold and dry, but billions of years ago, it was cold and wet. That's according to new evidence from NASA's  Curiosity rover , which is currently exploring a large crater on Mars. The rover has found geological evidence that lakes of liquid water existed in the crater 3.5 billion years ago. "The lakes may have existed for hundreds of thousands of years," says  John Grotzinger , a researcher at Caltech and chief scientist for the rover. But he adds, the lake network may have stuck around for millions of years. This is the second big water announcement NASA has made about Mars recently. Last week, the space agency revealed evidence that  salty, liquid water still flowed in small amounts  on the surface. Rocks on the surface of Mars suggest that liquid water pooled on the surface and remain...
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यहाँ हुन्छ सर्पहरुको रहस्यमय बैठक, भेला हुन्छन् हजारौँ सर्प (भिडियो सहित)

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ते १०:१९ मा प्रकाशित भलै झ्वाट्ट सुन्दा यो अजीब लाग्नसक्छ तर दुनियामा एउटा यस्तो ठाउँ पनि छ जहाँ सर्पहरुको बैठक बस्दछ । सर्पहरुको त्यो अनौठो भेलामा विभिन्न प्रकारका हजारौँ सर्पहरु जम्मा हुन्छन् । सर्पहरुको बैठकस्थलको रुपमा रहेको उक्त ठाउँ हो क्यानडाको मान्टिटोबा स्थित नार्सिस स्नेक डेन्स । त्यो ठाउँमा सर्पहरुको डरलाग्दो बिस्कुन देख्न सकिन्छ । धेरै सर्पहरु एक आपसमा गुजुल्टिएका हुन्छन् । सर्पहरुको बैठक वर्षैभर चल्दैन । अपि्रलको अन्तिम तथा मे को सुरुवाती हप्तामा यो बैठक चल्दछ । त्यहाँ जम्मा हुने मध्ये गार्टर प्रजातिका सर्पहरुको संख्या बढि हुनछ । नार्सिस इलाकामा किन त्यति धेरै सर्पहरु भेला हुन्छन् भन्ने कुराको रहस्य अहिलेसम्म पनि पत्ता लाग्न सकेको छैन । तर वैज्ञानिकहरुले भने तापक्रम बढेसँगै भाले सर्पहरुको सरीरमा हर्मोन उत्पादन हुने र सोही हर्मोनका कारण यौनक्रियाका लागि सबै भालेहरु एकैपटक सक्रिय हुँदा सर्पहरुको त्यो भिमकाय भेलाको दृश्य देखिने बताएका छन् । यौनक्रिडाका लागि आतुर दर्जनौँ भाले सर्पहरु एउटै पोथी सर्पमाथि गुँडुल्किएर बेरिएको देख्न सकिन्छ।  https://www.youtube....
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Growing Families That Stay Put Some families are crowding together for the sake of preserving close-knit neighborhood relationships, especially those forged among children.

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Ryan and Moira Goepfert were elated when they were selected for student housing at Columbia University. The move would put them in a renovated doorman building across from campus, and it would save them $600 a month in rent. But after Mr. Goepfert visited the quiet hallways of the university building, the couple turned down the offer. “Almost 100 percent of the reason was our daughter, Grace, and the relationships she’s built on our floor,” said Mr. Goepfert, 34, who is pursuing a degree at Columbia’s School of General Studies. The Goepferts live in a one-bedroom rental on West 119th Street in  Harlem . Their floor has six children between the ages of 4 months and 7 years and the family next door has a baby on the way. Especially in the winter, the children hang out in the 12-by-15-foot landing outside the elevator. They ride their scooters down the hallway and kick around a ball. While their children are playing, the families keep their doors unlocked. “As the kids have come ...
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