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分享 What killed the Maya? 'Blue Hole' offers clues
912726421 2015-1-3 12:27
(CNN) -- To scuba divers and tourists, Belize's famous "Blue Hole" underwater cave is a wonder, one of the "10 most amazing places on Earth," according to the Discovery Channel . To scientists, it's something more: evidence of the drought that is suspected to have led to the demise of the Mayan civilization. New research reinforces that theory, Rice University Earth scientist Andre Droxler told LiveScience . The team drilled cores from the Blue Hole sinkhole and a nearby lagoon. They found that the ratio of titanium to aluminum changed in the ninth and 10th centuries, a period when the Mayan civilization in the Yucatan Peninsula went into decline. More titanium means that heavier rains were affecting the region, since the runoff from the area's volcanic rock is rich in the element. But from about A.D. 800 to 1000, the ratio between the two elements was much smaller, indicating that there was much less rainfall. "When you have major droughts, you start to get famines and unrest," Droxler said. The Mayan civilization, noted for its advances in astronomy and agriculture (not to mention that calendar system that some believed prophesied world devastation on December 21, 2012 ), dominated the Yucatan in the first half of the first millennium A.D. But by 900, most of the civilization's cities, located in present-day Guatemala, El Salvador, Honduras and southern Mexico, had been abandoned. The question of why this happened has tantalized scientists and historians for decades. The drought theory isn't new, but the findings of Droxler and his colleagues buttress other studies. In 2012, samples from a 2,000-year-old stalagmite also showed that drought had afflicted the region in the latter half of the first millennium A.D. "The main finding was that a prolonged drought contributed to the collapse of Classic Mayan civilization," environmental archaeologist Douglas Kennett told LiveScience two years ago . Droxler and his colleagues published their findings in Scientific Reports .
42 次阅读|0 个评论
分享 ISIS governor of Mosul killed in coalition airstrikes
912726421 2014-12-26 22:06
(CNN) -- The latest ISIS-appointed governor of Mosul was killed in coalition airstrikes on Thursday, according to Iraqi police. Hassan Hassan Saeed Al-Jabouri, also known as Abu Taluut, was killed 18 miles south of Mosul in the village of Qayyara, according to Maj. Gen. Watheq Al-Hamdani, a senior regional Iraqi police commander who is leading the government's efforts to retake Mosul from ISIS. Jabouri is the second ISIS-appointed governor of Mosul killed by airstrikes and had been in office for less than 25 days. Photos: The ISIS terror threat Earlier this month, U.S. airstrikes killed one of his predecessors, Radwan Taleb Al-Hamdouni, according to U.S. security officials. Mosul is a key stronghold for ISIS fighters and was taken from Iraqi forces earlier this year. The Pentagon said that it has a strategy to retake the city beginning in January. Meanwhile, more than 100 people were injured or killed in six airstrikes by Syrian forces on the ISIS held city of al-Bab and the town of Qbasin in the northeast of Aleppo, according to the Syrian Observatory for Human Rights. In the village of Abo Qassayed, 30 ISIS militants were killed Tuesday as Syrian Kurdish forces captured that town held by ISIS, according to the observatory. ISIS captured a Jordanian fighter pilot Wednesday after his plane crashed over Raqqa. "Evidence clearly indicates" that the terrorist group "did not down the aircraft," U.S. Central Command said in a statement. Turkey warming up to Iraq Relations between Iraq and Turkey are improving because of the new government in Baghdad, Turkish Foreign Minister Mevlut Cavusoglu said Thursday. "Now that the coldness between Turkey and Iraq is over, we will accelerate our relations in every possible way," he said in a televised interview. Iraqi Prime Minister Haider al-Abadi said that Iraq and Turkey share common economic and security goals, according to Anadolu Agency, Turkey's government news agency. Iraq wants to reach global oil market's through Turkey, Al-Abadi said. Turkey's Prime Minister Ahmet Davutoglu promised that Turkey will not allow any foreign fighter access to Syria, whether they be Syrian opposition or ISIS fighters, according to Anadolu Agency.
12 次阅读|0 个评论
分享 Boko Haram attack on Chinese firm in Cameroon; soldier reported killed
912726421 2014-5-18 11:58
Full coverage of CNN international correspondent Nima Elbagir's Chibok journey will screen on CNN International on Saturday 17 May at 2100 CET, Sunday 18 May at 0030 CET, 0400 CET and 1200 CET and Monday 19 May at 0730 CET. (CNN) -- A Cameroonian soldier was killed and 10 Chinese nationals went missing after a Boko Haram attack in northern Cameroon, officials from China, the United States and France said Saturday. No further details were immediately available on the circumstances of their disappearance, said Lu Quinjiang, first counselor of the Chinese Embassy in Yaounde, Cameroon's capital. One Chinese national was injured in Friday night's attack and was being treated by a Chinese medical team in the Chadian capital of N'Djamena, Lu said. French President François Hollande mentioned the incident Saturday while hosting a security summit in Paris about the growing threat from Boko Haram, the Nigeria-based terror group. Witnesses to Terror Later, U.S. Undersecretary of State Wendy Sherman specified Boko Haram as being behind Friday's attack in a region of Cameroon known to be a stronghold for the group. "Cameroon just suffered its own Boko Haram attack at a Chinese company last night," Sherman said, noting also that Boko Haram is to blame for the abduction of more than 200 schoolgirls in Nigeria. Several African and Western nations stepped up their search for the girls under a new plan announced at the security summit. Boko Haram translates as "Western education is a sin" in the Hausa language that's the lingua franca in West and Central Africa. The militant group says its aim is to impose stricter enforcement of Sharia law across Nigeria, Africa's most populous nation, which is split between a majority Muslim north and a mostly Christian south. Boko Haram's attacks have intensified in recent years. Cameroon attac k Friday's attack targeted employees of a Chinese company in the northern Cameroonian town of Waza, a few miles away from the Nigerian border. U.S. questions Nigeria's rescue ability; France hosts summit The Chinese embassy is working with Cameroon's government to locate the missing workers, Lu said, and has asked for tighter security to protect Chinese nationals in the northern part of the country. The Chinese company, Sinohydro, is an engineering firm that builds large scale hydropower projects. It has been involved in the construction of the Memve'ele dam in southern Cameroon as part of the country's effort to boost electricity production, according to the company's website. Last year, a group of Boko Haram fighters crossed into northern Cameroon and abducted a French family of four children, their parents and an uncle from Waza National Park. The family was eventually released, reportedly in exchange for a $3 million ransom and the release of 16 Boko Haram prisoners held in Cameroon.
29 次阅读|0 个评论
分享 Report: All suspects in China train station killing arrested or killed
912726421 2014-3-3 23:09
(CNN) -- Police have arrested three more suspects in Saturday's knife attack that killed dozens of people at a train station in the southwestern Chinese city of Kunming, China's state-run Xinhua news agency reported Monday, citing the Ministry of Public Security. Authorities now believe all eight alleged attackers have been arrested or killed, Xinhua reported. Four are under arrest, and four were fatally shot by police at the scene Saturday, according to the news agency. Attackers with long knives stormed the station , killing at least 28 people and wounding 113, according to Xinhua. Members of a separatist group from Xinjiang, in northwest China, are believed to have carried out the assault, authorities said. Xinhua's reports referred to them as terrorists.
20 次阅读|0 个评论
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