In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Chelyabinsk meteorite fragment weighing almost 600 kg lifted from Lake Chebarkul 
  
 A giant fragment of the Chelyabinsk meteorite was lifted from the bottom of Lake Chebarkul near the city of Chelyabinsk in the Russian Urals Mountains on Wednesday. The fragment weighing about 570 kg proved so heavy that even the weighing machine broke, making it impossible to measure the exact weight. 
  
 Sergei Zamozdra, a professor of the Chelyabinsk State University, confirmed the meteorite nature of the rock. 
  
 "Some peculiarities characteristic of stone meteorites prove that it’s a fragment of the Chelyabinsk meteorite. In all probability, it will rank among the top ten largest meteorites ever found," the scientist said. 
  
 Chelyabinsk researchers get 11-kilo fragment of Chebarkul meteorite 
  
 Chelyabinsk State University researchers have got an 11-kilo stone of what they believe is a fragment of the meteorite that pierced the ice of Lake Chebarkul in February this year. This is the 13th stone that has since been recovered from the lake bottom, according to the University website. 
  
 The Director of the University Centre for the project management of innovations and expert assessment, Andrei Kocherov, is quoted as saying in the site report that the object recovered resembles a meteorite fragment by outward signs, and weighs 11 kilos. 
  
  
  
 Photo: Voice of Russia 
  
 According to earlier reports, the biggest fragment that’s been previously recovered and proved to be a part of actual meteorite weighs 4.47 kilos. 
  
 Later this Wednesday, a giant fragment of the celestial body weighing from 300 kilos to 500 kilos is due to be recovered for research. 
  
  
  
  
  
 Photo: Voice of Russia 
  
 The meteorite that later came to be known as ‘Chelyabinsk Meteorite”, hit the earth, specifically Lake Chebarkul in the Chelyabinsk Region, on February 15th this year. The chemical analysis of the fragments that have been recovered thus far has proved that this is ordinary LL5 chondrite, one of the types of stony meteorites. The biggest fragment is believed to remain on the bottom of Lake Chebarkul. The expeditions that’s been searching for it is due to recover an oval stone measuring 30 centimetres to 1 metre in diameter, and weighing up to 600 kilos, the RIA-Novosti news agency reports. 
  
 Chelyabinsk meteorite as old as solar system - scientists 
  
 The Chelyabinsk meteorite was as old as the solar system, deputy head of the planetary research and space chemistry department of the Russian Academy of Sciences' Institute of Geo-Chemistry and Analytical Chemistry Mikhail Marov said on Friday. 
  
 "An analysis of Chelyabinsk meteorite fragments shows that its age practically coincides with that of the solar system, 4.56 billion years. In fact, we possess a rock from the times of genesis," Marov said during the Day of Space Science hosted by the Academy Space Research Institute. 
  
 It is possible that the Chelyabinsk meteorite collided with another space body about 300 million years ago, the scientist said. 
  
 "This is just a theory, we cannot say for certain yet that this event has actually taken place," Marov said. 
  
 In the opinion of scientists, the initial mass of the Chelyabinsk meteorite was around ten tonnes at an altitude of 1,000 kilometers. 
  
 The mass was reduced to about one tonne at an altitude of 23 kilometers, when meteorite fragments exploded. 
  
 Most probably, the Chelyabinsk meteorite "is a fragment of a larger body, which continues its existence," Marov said. 
  
 Scientists attribute the Chelyabinsk meteorite to the family of Apollo asteroids. 
  
 Some 10,000 asteroids with a diameter larger than one kilometer may be cruising the solar system, and "approximately 90% of them have been discovered," Marov said. 
  
 The total mass of asteroids is estimated at 1/2000 of the Earth's mass. 
  
 A large meteorite hit the Earth's atmosphere on February 15, 2013. It exploded above Lake Chebarkul in the Chelyabinsk region, Russia. 
  
 Scientists compare Chelyabinsk meteorite with nuclear bomb 
  
 The explosion yield of the Chelyabinsk meteorite was comparable with that of a nuclear bomb, deputy head of the planetary research and space chemistry department of the Russian Academy of Sciences' Institute of Geo-Chemistry and Analytical Chemistry Mikhail Marov said on Friday. 
  
 "Actually, the speed of a meteorite's vertical drift is typical of surface nuclear explosions, which makes appropriate the comparison with a nuclear explosion," he said during the Day of Space Science hosted by the Academy Space Research Institute. Some 1,000 cubic meters of gas were emitted in the explosion and the gas mass' heating reached dozens of degrees, he said. 
  
 "That was a truly immense event," Marov stressed. 
  
 More than 1,500 people asked for medical assistance after the meteorite's shockwaves blasted through the skies over Chelyabinsk. A large meteorite hit the Earth's atmosphere on February 15, 2013. 
  
 It exploded above Lake Chebarkul in the Chelyabinsk region, Russia. 
  
  
  
 Voice of Russia, Interfax, RIA ||||| People look at what scientists believe to be a chunk of the Chelyabinsk meteor, recovered from Chebarkul Lake near Chelyabinsk, about 1500 kilometers (930 miles) east of Moscow, Russia, Wednesday, Oct. 16, 2013. Scientists on Wednesday recovered what could be the largest part of this meteor from Chebarkul Lake outside the city. They weighed it using a giant steelyard balance, which displayed 570 kilograms (1,256 pounds) before it broke. (AP Photo/Alexander Firsov) Russian divers Wednesday pulled from a murky lake in the Urals a half-tonne suspected meteorite said to have been part of a meteor whose ground-shaking shockwave hurt 1,200 people in February. 
  
 The dramatic recovery operation came eight months after a piercing streak of light lit up the morning sky in the central Russian region of Chelyabinsk in scenes some locals said made them think of the onset of a nuclear war. 
  
 The meteor broke up into myriad pieces—some no bigger than the size of a fingernail—that scientists are still finding across the remote region to this day. 
  
 Much of the debris landed in a local lake called Chebarkul that the divers entered on Wednesday in an operation covered live on national television. 
  
 Broadcasts showed a team pull out a 1.5-metre-long (five-foot-long) rock from the lake after first wrapping it in a special casing while it was still underwater. 
  
 The boulder was then pulled ashore and placed on top of a massive scale for the all-important weighing—an operation that quickly went partially wrong. 
  
 The rock crumbled into several chunks as scientists began lifting it from the ground with the help of levers and ropes. 
  
 The scale itself broke the moment it hit the 570-kilogramme (1,255-pound) mark. 
  
 "The rock had a fracture when we found it," one unnamed scientist told the lifenews.ru website in a live broadcast. 
  
 "It weighed 570 kilogrammes before the pieces fell off. And then the scale broke," said the scientist. 
  
 "We think the whole thing weighs more than 600 kilogrammes," he said. 
  
 Experts warned it will take time before scientists can certify that the rock they pulled from the lake did indeed come from outer space. 
  
 A police officer stands near a six-metre hole in the ice of a frozen lake, reportedly the site of a meteor fall, outside the town of Chebakul in the Chelyabinsk region on February 15, 2013 
  
 The Vesti 24 rolling news channel reported that divers had already recovered more than 12 pieces from Lake Chebarkul since the February 15 incident. 
  
 Only four or five of the pieces turned out to be real meteorites, the channel said. 
  
 But researchers at a local university seemed confident in their latest find. 
  
 Divers retrieve what is believed to be part of the Chelyabinsk meteor from Chebarkul Lake near Chelyabinsk, some 1500 kilometers (930 miles) east of Moscow, Russia, Wednesday, Oct. 16, 2013. Scientists on Wednesday recovered what could be the largest part of this meteor from Chebarkul Lake outside the city. They weighed it using a giant steelyard balance, which displayed 570 kilograms (1,256 pounds) before it broke. (AP Photo/Alexander Firsov) 
  
 "Based on our initial observations... this is a part of the Chelyabinsk meteor," Sergei Zamozdra, a lecturer at Chelyabinsk State University, told the Interfax news agency. 
  
 "This is the largest fragment of that meteor," said the scientist. 
  
 "And most likely, it will be one of the 10 largest meteorites ever found." 
  
 The meteor weighed a whopping 10,000 tonnes when it exploded a few kilometres up in the air with the force equivalent to 30 of the nuclear bombs dropped on the Japanese city of Hiroshima during World War II. 
  
 US scientists said an object that large usually approaches Earth only once every four decades. 
  
 In this Friday, Feb. 15, 2013 file photo provided by Chelyabinsk.ru, a meteorite contrail is seen over the Ural Mountains' city of Chelyabinsk, about 1500 kilometers (930 miles) east of Moscow, Russia. Scientists on Wednesday recovered what could be the largest part of this meteor from Chebarkul Lake outside the city. They weighed it using a giant steelyard balance, which displayed 570 kilograms (1,256 pounds) before it broke. (AP Photo/Chelyabinsk.ru, Yekaterina Pustynnikova) 
  
 Residents of Chelyabinsk—once a part of the Soviet Union's industrial heartland that has seen a dramatic slide in living standards of late—have been trying to use the meteor as a way to draw tourists to their isolated part of Russia. 
  
 A special council made up of scientists and prominent residents this week urged the local government to erect a six-storey-tall statue in honour of the space rock. 
  
 Chelyabinsk media reports said the council is also hoping to set up special hiking trails for foreign tourists interested in visiting the lake and other spots where debris was found. 
  
 Explore further: Stunning meteor showers light up California sky (Update) ||||| For NDTV Updates, 
  
 Russian divers Wednesday pulled from a murky lake in the Urals a half-tonne suspected meteorite said to have been part of a meteor whose ground-shaking shockwave hurt 1,200 people in February.The dramatic recovery operation came eight months after a piercing streak of light lit up the morning sky in the central Russian region of Chelyabinsk in scenes some locals said made them think of the onset of a nuclear war.The meteor broke up into myriad pieces -- some no bigger than the size of a fingernail -- that scientists are still finding across the remote region to this day.Much of the debris landed in a local lake called Chebarkul that the divers entered on Wednesday in an operation covered live on national television.Broadcasts showed a team pull out a 1.5-metre-long (five-foot-long) rock from the lake after first wrapping it in a special casing while it was still underwater.The boulder was then pulled ashore and placed on top of a massive scale for the all-important weighing -- an operation that quickly went partially wrong.The rock crumbled into several chunks as scientists began lifting it from the ground with the help of levers and ropes.The scale itself broke the moment it hit the 570-kilogramme (1,255-pound) mark."The rock had a fracture when we found it," one unnamed scientist told the lifenews.ru website in a live broadcast."It weighed 570 kilogrammes before the pieces fell off. And then the scale broke," said the scientist."We think the whole thing weighs more than 600 kilogrammes," he said.Experts warned it will take time before scientists can certify that the rock they pulled from the lake did indeed come from outer space.The Vesti 24 rolling news channel reported that divers had already recovered more than 12 pieces from Lake Chebarkul since the February 15 incident.Only four or five of the pieces turned out to be real meteorites, the channel said.But researchers at a local university seemed confident in their latest find."Based on our initial observations... this is a part of the Chelyabinsk meteor," Sergei Zamozdra, a lecturer at Chelyabinsk State University, told the Interfax news agency."This is the largest fragment of that meteor," said the scientist."And most likely, it will be one of the 10 largest meteorites ever found."The meteor weighed a whopping 10,000 tonnes when it exploded a few kilometres up in the air with the force equivalent to 30 of the nuclear bombs dropped on the Japanese city of Hiroshima during World War II.US scientists said an object that large usually approaches Earth only once every four decades.Residents of Chelyabinsk -- once a part of the Soviet Union's industrial heartland that has seen a dramatic slide in living standards of late -- have been trying to use the meteor as a way to draw tourists to their isolated part of Russia.A special council made up of scientists and prominent residents this week urged the local government to erect a six-storey-tall statue in honour of the space rock.Chelyabinsk media reports said the council is also hoping to set up special hiking trails for foreign tourists interested in visiting the lake and other spots where debris was found. |||||
A: 
A big chunk of meteorite, believed to be part of the one that rocked Russia in February, has been pulled from a lake in the Ural Mountains. Divers hauled the 5-foot rock out of Lake Chebarkul today, in an event broadcast live on Russian TV. Things got a bit rocky, however, when the chunk broke into three parts as it was lifted up to a scale. Then the scale itself broke at the 1,255-pound mark. One scientist says the rock is believed to be at least 1,322 pounds, reports Phys.org. "Some peculiarities characteristic of stone meteorites prove that it’s a fragment of the Chelyabinsk meteorite," a scientist at Chelyabinsk State University tells Voice of Russia. "In all probability, it will rank among the top 10 largest meteorites ever found." One local news station says officials have already recovered 12 other rocks from the lake, though only only four or five ended up being actual parts of the meteorite, AFP reports.