A Nepalese couple is silhouetted against the setting sun in Kathmandu, Nepal, February 17, 2016. (Photo by Narendra Shrestha/EPA)





A flame-red evening sky over Westerlinde near Salzgitter, Germany, is lilluminated by the setting sun on 19 Janaury 2016. (Photo by Peter Steffen/EPA)





DHL's Twisters & Extra 300 performs during the third day of the Bahrain Air Show 2016 at Sakhir, Bahrain January 23, 2016. (Photo by Hamad I Mohammed/Reuters)





A dog walker on Longsands beach before sunrise in Tynemouth, UK on April 1, 2016. (Photo by Owen Humphreys/PA Wire)





A view of the Aegean Sea as seen aboard a rescue vessel from MOAS, Migrant Offshore Aid Station, a Malta-based organization aimed to rescue migrants on sea, as it patrols between the eastern Greek Island of Agathonisi and Turkish shores, Sunday, Feb. 28, 2016. (Photo by Lefteris Pitarakis/AP Photo)





A general view of court action as the weather closes in on day 3 of the FIVB Kish Island on February 17, 2016 in Kish Island, Iran. (Photo by Amin M. Jamali/Getty Images)





An aircraft flies during sunset on a cold day in Mexico City January 16, 2016. (Photo by Edgard Garrido/Reuters)





A father and his son watch the sun set in Encinitas, California January 19, 2016. (Photo by Mike Blake/Reuters)





Clouds float across the Pacific Ocean after sunset in Encinitas, California January 19, 2016. (Photo by Mike Blake/Reuters)





A Channel Ferry sails from Britain towards France, January 20, 2016. (Photo by Toby Melville/Reuters)





Women sit on a swing at the seaside of Ramlet al-Bayda beach as storm clouds loom during sunset in Beirut, Lebanon January 23, 2016. (Photo by Jamal Saidi/Reuters)





The skyline is photographed early evening in Frankfurt, Germany, January 26, 2016. (Photo by Kai Pfaffenbach/Reuters)





Dark rain clouds cut across the blue sky near Duerroehrsdorf, Germany, 03 February 2016. (Photo by Arno Burgi/EPA)





The morning sun rises behind residential homes on a hillside in Cardiff, California January 27, 2016. (Photo by Mike Blake/Reuters)





The sun sets behind the Statue of Liberty in New York Harbor with New Jersey behind, as seen from the Brooklyn Bridge in New York January 28, 2016. (Photo by Brendan McDermid/Reuters)





Storm clouds gather over Shell's Pulau Bukom oil refinery in Singapore January 30, 2016. (Photo by Edgar Su/Reuters)





The sun sets behind Sisli business district, which comprises leading Turkish companies' headquarters and popular shopping malls, in Istanbul, Turkey February 1, 2016. (Photo by Murad Sezer/Reuters)





Vehicles are seen on a highway as the sun sets near the city of Stara Zagora, Bulgaria, February 3, 2016. (Photo by Stoyan Nenov/Reuters)





A man rides a horse-drawn carriage on the frozen Cildir lake in Kars province, eastern Turkey, February 5, 2016. (Photo by Umit Bektas/Reuters)





Clouds gather over Havana at sunset February 11, 2016. (Photo by Enrique de la Osa/Reuters)





Waves and beach front along the Atlantic Ocean coast are pictured at sunset in Cap Ferret, southwestern France, February 19, 2016. (Photo by Regis Duvignau/Reuters)





An airplane leaves a vapor trail as it flies past a cloud during dusk as seen from Paracuellos del Jarama, Spain, March 3, 2016. (Photo by Sergio Perez/Reuters)





Windmills tower over a field near the city of Waremme, Belgium, March 28, 2016. (Photo by Yves Herman/Reuters)





Windmills tower over a field near the city of Waremme, Belgium, March 28, 2016. (Photo by Yves Herman/Reuters)





A plane flies through the morning sky past the sun hidden behind clouds on February 11, 2016 in Frankfurt am Main, western Germany. (Photo by Frank Rumpenhorst/AFP Photo/DPA)





Clouds hover over the capital city of Damascus, Syria, Thursday, February 25, 2016. (Photo by Hassan Ammar/AP Photo)





Sun sets in the backdrop of still boats in the waters of Dal Lake in Srinagar, the summer capital of Indian Kashmir, 23 March 2016. (Photo by Farooq Khan/EPA)