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This April 25, 2013 photo provided by the University of Hawaii shows the domed structure that will house six researchers for eight months in an environment meant to simulate an expedition to Mars, on Mauna Loa on the Big Island of Hawaii. The group will enter the geodesic dome Thursday, Jan. 19, 2017, and spend eight months together in the 1,200 square foot research facility in a study called Hawaii Space Exploration Analog and Simulation (HI-SEAS). They will have no physical contact with any humans outside their group, experience a 20-minute delay in communications and are required to wear space suits whenever they leave the compound. (Sian Proctor/University of Hawaii via AP)

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This undated file image provided by NASA shows the agency's outline for a journey to Mars. A group of NASA-funded researchers are entering an isolated geodesic dome perched on a remote Hawaii volcano to study human behavior for future long-term space exploration, including voyages to Mars. The six crew members will enter the structure on the Big Island's Mauna Loa Thursday, Jan. 19, 2017, and will spend eight months together in the research facility without physical contact with any other human beings. (NASA via AP, File)

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This image provided by NASA shows the planet Mars. A group of NASA-funded researchers are entering an isolated geodesic dome perched on a remote Hawaii volcano to study human behavior for future long-term space exploration, including future trips to Mars. The six crew members entered a dome structure on the Big Island's Mauna Loa Thursday, Jan. 19, 2017, and will spend eight months together in the research facility without physical contact with any other human beings. (NASA via AP)

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In this May 23, 2014 photo provided by the University of Hawaii, Lucie Poulet, right, uses a geotechnical tool while Annie Caraccio records the data during a previous study outside the domed structure that will house six researchers for eight months in an environment meant to simulate an expedition to Mars, on Mauna Loa on the Big Island of Hawaii. The group will enter the dome Thursday, Jan. 19, 2017, and spend eight months together in the 1,200-square-foot research facility in a study called Hawaii Space Exploration Analog and Simulation (HI-SEAS). They will have no physical contact with any humans outside their group, experience a 20-minute delay in communications and are required to wear space suits whenever they leave the compound. (Ross Lockwood/University of Hawaii via AP)

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An electric vehicle charging station awaits a vehicle in the parking lot at the Hawaii State Legislature on Wednesday, Jan. 18, 2017 in Honolulu. Renewable energy advocates in Hawaii are pushing a bill to urge the transportation sector to get all its energy from renewable sources in 2045. (AP Photo/Cathy Bussewitz)

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An electric vehicle charging station awaits a vehicle in the parking lot at the Hawaii State Legislature on Wednesday, Jan. 18, 2017 in Honolulu. Renewable energy advocates in Hawaii are pushing a bill to urge the transportation sector to get all its energy from renewable sources in 2045. (AP Photo/Cathy Bussewitz)

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In this Dec. 15, 2016 photo, a Teddy bear sits on a pile of fur coats in the home of Susan McLoughlin in Beloit, Wis. McLoughlin creates Teddy bears and other stuffed animals out of recycled fur coats. (Erica Pennington/The Beloit Daily News via AP)

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In this Dec. 15, 2016 photo, Susan McLoughlin sews in her Beloit, Wis., home. McLoughlin creates Teddy bears and other stuffed animals out of recycled fur coats. (Erica Pennington /The Beloit Daily News via AP)

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Contractors work on a sinkhole Wednesday, Jan. 18, 2017, in Orinda, Calif. The city council of Orinda declared a State of Emergency Tuesday night because of the large sinkhole caused by last week's wet weather, which ruptured sewer lines. Repairs will take weeks, as the San Francisco Bay Area is being hit with a new series of rain storms. (AP Photo/Ben Margot)

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Contractors survey a 72-inch sinkhole Wednesday, Jan. 18, 2017, in Orinda, Calif. The city council of Orinda declared a State of Emergency Tuesday night because of a large sinkhole caused by last week's wet weather. Repairs will take at least four weeks, as the San Francisco Bay Area is being hit with a new series of rain storms. (AP Photo/Ben Margot)

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Contractors survey a 72-inch sinkhole Wednesday, Jan. 18, 2017, in Orinda, Calif. The city council of Orinda declared a State of Emergency Tuesday night because of a large sinkhole caused by last week's wet weather. Repairs will take at least four weeks, as the San Francisco Bay Area is being hit with a new series of rain storms. (AP Photo/Ben Margot)

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A 72-inch deep sinkhole is seen Wednesday, Jan. 18, 2017, in Orinda, Calif. The city council of Orinda declared a State of Emergency Tuesday night because of a large sinkhole caused by last week's wet weather, which ruptured two sewer lines. Repairs will take at least four weeks, as the San Francisco Bay Area is being hit with a new series of rain storms. (AP Photo/Ben Margot)

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Tow truck driver Donny Callahan prepares to pull a semi truck out of a ditch in Troutdale, Ore., Wednesday, Jan. 18, 2017. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places. (AP Photo/Don Ryan)

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Trucks and other traffic is diverted off of eastbound Interstate 90 before Snoqualmie Pass, Wednesday, Jan. 18, 2017, in North Bend, Wash. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places. In Washington state, I-90, the main highway connecting western and eastern Washington, was to remain closed over Snoqualmie Pass because of hazardous winter conditions. (AP Photo/Elaine Thompson)

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A truck remains partially covered with ice and parked after being forced to turn around on Snoqualmie Pass when Interstate 90 closed earlier Wednesday, Jan. 18, 2017, in North Bend, Wash. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places. In Washington state, I-90, the main highway connecting western and eastern Washington, was to remain closed over Snoqualmie Pass because of hazardous winter conditions. (AP Photo/Elaine Thompson)

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Local traffic passes trucks parked on the shoulder and waiting for eastbound Interstate 90 to open, Wednesday, Jan. 18, 2017, in North Bend, Wash. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places. In Washington state, I-90, the main highway connecting western and eastern Washington, was to remain closed over Snoqualmie Pass because of hazardous winter conditions. (AP Photo/Elaine Thompson)

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In this image provided by the Hood River County Sheriff, lights from a school reflect off the ice-coated parking lot in Hood River, Ore., Wednesday, Jan. 18, 2017. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places.(Joel Ives/Hood River County Sheriff via AP)

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Icicles hang from a street sign at the University of Idaho, Wednesday, Jan. 18, 2017, in Moscow, Idaho. The region was hit with an ice storm overnight, and is now under a flood watch because of rain and melting snow. (Geoff Crimmins/The Moscow-Pullman Daily News via AP)

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A pedestrian walks into the street to get around an icy sidewalk and a large puddle along Sixth Street on Wednesday, Jan. 18, 2017, in Moscow, Idaho. The region was hit with an ice storm overnight, and is now under a flood watch because of rain and melting snow. (Geoff Crimmins/The Moscow-Pullman Daily News via AP)

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Billy Graham, from Texas, walks carefully on hard packed snow and ice as he makes his way to a restaurant in Troutdale, Ore., Wednesday, Jan. 18, 2017. An ice storm shut down parts of major highways and interstates Wednesday in Oregon and Washington state and paralyzed the hardest hit towns along the Columbia River Gorge with up to 2 inches of ice coating the ground in some places.(AP Photo/Don Ryan)