This image released by NASA December 15,...This image released by NASA December 15, 2014 shows the easily recognized boot of Italy, with Sicily at its toe, spread across this panorama taken October 21 by astronauts aboard the International Space Station(ISS). On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines, but also in the Po River Valley of northern Italy(L). Some of the brightest clusters of lights are Rome and nearby Naples, with island cities of Cagliari on Sardinia and Catania on Sicilynow well-known as the hometown of European Space Agency astronaut Luca Parmitano. The small, dark, circular patch dangerously close to Catania marks the unpopulated slopes of the active volcano Etna. Hazy lights, as over the Po valley and Rome, probably indicate thin clouds above. The island of Malta appears at the lower right. The airglow line is vivid in this night shot. AFP PHOTO / HANDOUT / NASA   == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: "AFP PHOTO / HANDOUT / NASA  "/ NO MARKETING / NO ADVERTISING CAMPAIGNS / NO A LA CARTE SALES / DISTRIBUTED AS A SERVICE TO CLIENTS ==Handout/AFP/Getty Images

NASA/AFP/Getty

This image released by Nasa on Monday shows the easily recognised ‘boot of Italy‘, with Sicily at its toe. On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines.

A supporter of Zaman holds a copy of the...A supporter of Zaman holds a copy of the newspaper behind a Turkish flag during a demostration against the arrest of journalists outside the Istanbul police headquarters on December 15, 2014. The Turkish government faced accusations of eroding democracy and press freedoms after over two dozen people were arrested in raids against media critical of President Recep Tayyip Erdogan. AFP PHOTO / OZAN KOSEOZAN KOSE/AFP/Getty Images

Ozan Koseo/AFP/Getty

Supporter of Turkey’s Zaman demonstrate against the arrest of journalists, outside the Istanbul police headquarters. The Turkish government has been accused of eroding democracy and press freedoms after over two dozen people were arrested in raids against media critical of President Recep Tayyip Erdogan

An Iranian woman walks past mannequins l...An Iranian woman walks past mannequins locked to a gas pipe in northern Tehran on December 15, 2014. AFP PHOTO/BEHROUZ MEHRIBEHROUZ MEHRI/AFP/Getty Images

Behrouz Mehri/AFP/Getty

An Iranian woman walks past mannequins locked to a gas pipe in northern Tehran on Monday 

Traffic resumes after the last "Occupy" protest site is cleared at a main road at Causeway Bay shopping district in Hong Kong...Traffic resumes after the last "Occupy" protest site is cleared at a main road at Causeway Bay shopping district in Hong Kong December 15, 2014. Hong Kong authorities arrested several pro-democracy activists on Monday as they cleared the last of three protest sites, marking the closure of demonstration camps in the city that have blocked streets for more than two months. REUTERS/Athit Perawongmetha (CHINA - Tags: POLITICS CIVIL UNREST)

Athit Perawongmetha/Reuters

Traffic resumes after the last Occupy protest site is cleared at a retail district in Hong Kong. The authorities arrested several pro-democracy activists on Monday as they cleared the last of three protest sites, marking the end of the demonstrations that have blocked the city’s streets for more than two months.

An Indian elderly man drinks tea to beat the cold early morning in old parts of New Delhi, India, Monday, Dec. 15, 2014. Cold wave conditions have intensified in the capital after scattered rains occurred in some parts of the city on Sunday, according to local reports. (AP Photo/Bernat Armangue)

Bernat Armangue/AP

An elderly man drinks tea to beat the cold early morning in old parts of New Delhi, India 

REUTERS PICTURE HIGHLIGHT...ATTENTION EDITORS - REUTERS PICTURE HIGHLIGHT TRANSMITTED BY 0730 GMT ON DECEMBER 15, 2014    TBW26 - A hostage runs towards a police officer outside Lindt cafe, where other hostages are being held, in Martin Place in central Sydney December 15, 2014. REUTERS/Jason Reed     REUTERS NEWS PICTURES HAS NOW MADE IT EASIER TO FIND THE BEST PHOTOS FROM THE MOST IMPORTANT STORIES AND TOP STANDALONES EACH DAY. Search for "TPX" in the IPTC Supplemental Category field or "IMAGES OF THE DAY" in the Caption field and you will find a selection of 80-100 of our daily Top Pictures.    REUTERS NEWS PICTURES.     TEMPLATE OUT

Jason Reed/Reuters

A hostage runs towards a police officer outside Lindt Chocolat Café, where other hostages were being held, in Martin Place in central Sydney, Australia on Monday 

Afghani President Ashraf Ghani visits Germany...epaselect epa04516194 German Chancellor Angela Merkel (R) and Afghani President Ashraf Ghani take part in a press conference at the Federal Chancellery in†Berlin,†Germany, 05 December 2014. Ashraf Ghani is making his first official visit to Germany since becoming President.  EPA/WOLFGANG†KUMM

Wolfgang Kumm/EPA

German Chancellor Angela Merkel and Afghani President Ashraf Ghani take part in a press conference at the Federal Chancellery in Berlin. Ashraf Ghani is making his first official visit to Germany since becoming President.

Members of the glaciology unit of Peru's national water authority walk on the Pastoruri glacier in Huaraz, Peru, Thursday, Dec. 4, 2014. The glaciology unit is studying the measurement of ice thickness. According to Alejo Cochachin, coordinator of the glaciology unit, the Pastoruri glacier retreated 576 meters between 1980 and 2014. Peru's glaciers have lost more one-fifth of their mass in just three decades, and the 70 percent Peruís 30 million people who inhabit the countryís Pacific coastal desert, depend on glacial runoff for hydropower and to irrigate crops, meaning their electricity and long-term food security could also be in peril. Higher alpine temperatures are killing off plant and animal species in cloud forests and scientists predict Pacific fisheries will suffer. (AP Photo/Rodrigo Abd)

Rodrigo Abd/AP

Members of the glaciology unit of Peru’s national water authority walk on the Pastoruri glacier in Huaraz, Peru. The glaciology unit is measuring ice thickness and according to Alejo Cochachin at the unit, the Pastoruri glacier retreated 576 metres between 1980 and 2014 

NASA Prepares For Orion Test Launch...CAPE CANAVERAL, FL - DECEMBER 05:  In this handout provided by National Aeronautics and Space Administration (NASA), Bright lights illuminate the United Launch Alliance Delta IV Heavy rocket with NASA's Orion spacecraft mounted on top is seen in the early hours of the morning atCape Canaveral Air Force Station's Space Launch Complex 37 on Decemeber 05, 2014 at Cape Canaveral, Florida. Orion is scheduled to launch and make its first flight test later in the morning. The spacecraft will orbit Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing in the Pacific Ocean. No one will be aboard Orion for this flight test, but the spacecraft is designed to allow us to journey to destinations never before visited by humans, including an asteroid and Mars. (Photo by Bill Ingalls/NASA via Getty Images)

Bill Ingalls/Getty/NASA

Lights illuminate the Delta IV rocket that blasted the Orion spacecraft into space at 7.05am US eastern time on Friday at Cape Canaveral, Florida. The spacecraft will orbit Earth twice, reaching an altitude of about 3,600 miles above Earth before landing in the Pacific Ocean