Russia's Ekaterina Birlova casts a shadow on the sand as she serves to Poland during a women's beach volleyball match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 9, 2016. (Photo by Marcio Jose Sanchez/AP Photo)

A bishop walks past a new street-art collage by Italian artist Maupal showing Pope Francis playing tic-tac-toe and drawing peace signs as a Swiss guard keep watches the street near the Vatican on October 19, 2016 in Rome. (Photo by Tiziana Fabi/AFP Photo)

The Invasion. A quiet street in Macau. Modernization around is quickly changing the city, as documented by Paul Tsui. (Photo by Paul Tsui/National Geographic Travel Photographer of the Year Contest)

The lightest material ever made has been produced by a team of scientists in China, a Chinese university announced.

Fire performer, Polly from Broken Theatre, at the launch of the Púca Festival Halloween 2022 programme at Dublin Castle on September 13, 2022. Returning to Co. Meath from Friday 28th to Monday 31st October 2022 across festival hubs Trim and Athboy, Púca is an authentic, immersive and otherworldly festival that celebrates Ireland as the birthplace of Halloween. (Photo by Julien Behal/The Irish Times)

Shortlist, open competition, lifestyle. Healing Vibes – the hot springs of Bagno Vignoni in Italy flow out at a temperature of about 49°C. They were appreciated by the Romans for their healing powers, and have been used as therapeutic treatments since the 12th century, under Emperor Federico II. (Photo by Stefano Butturini/Sony World Photography Awards)

People jump over the fire wearing traditional Russian village-style clothes as they celebrate the summer solstice with a bonfire in the village of Okunevo, about 200 kilometers (125 miles) northeast of the Siberian city of Omsk, Russia, in Okunevo, Russia, late Thursday, June 20, 2024. (Photo by Evgeniy Sofiychuk/AP Photo)

Young Russian women dance to the music of Soojin on the pedestrian of Nikolskaya street near Red Square and the Kremlin in Moscow, Russia, Thursday, July 18, 2024. Seo Soo-jin, better known mononymously as Soojin, is a South Korean singer, dancer, and rapper, who has many fans in Russia. (Photo by Alexander Zemlianichenko/AP Photo)