A girl yawns as she and others wait for the start of their first day in school, an occasion known as the Day of Knowledge, in the small town Ignalina, some 110km (68 miles) north of the capital Vilnius, Lithuania, Monday, September 2, 2019. (Photo by Mindaugas Kulbis/AP Photo)

A girl, named Tata and aged 8, wears a Red Army uniform-styled dress during the celebrations of Victory Day, which marks the 78th anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia on May 9, 2023. (Photo by Shamil Zhumatov/Reuters)

Muslim girls have their hands painted with traditional henna as they attend an Eid al-Fitr prayer, marking the end of the fasting month of Ramadan, at historical Badshahi mosque in Lahore, Pakistan, Wednesday, April, 10, 2024. (Photo by K.M. Chaudary/AP Photo)

A Chinese girl in traditional dress eats her lunch in a Five Guys restaurant in between shooting videos for her Chinese social media account on October 18, 2023 in London, United Kingdom. (Photo by Dan Kitwood/Getty Images)

Playful little Asian girl having fun with Christmas decorations, holding up pine cones over eyes against decorated Christmas tree at Christmas time. Christmas lifestyle. Celebrating Christmas. Holiday and festive vibes. (Photo by d3sign/Getty Images)

Kyrgyz girls pose in traditional costumes during the Nowruz celebration in Bishkek, Kyrgyzstan, 20 March 2024. Nowruz is the Persian New Year celebrated by various ethnic groups worldwide and it traditionally marks the first day of spring. (Photo by Igor Kovalenko/EPA/EFE)

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Lake Natron is a salt lake located in northern Tanzania, close to the Kenyan border, in the eastern branch of the East African Rift. The lake is fed by the Southern Ewaso Ng'iro River and also by mineral-rich hot springs. It is quite shallow, less than three meters (10 feet) deep, and varies in width depending on its water level, which changes due to high levels of evaporation, leaving concentrations of salt and other minerals, notably sodium carbonate (natron).

A team from Woody's Ice Cream shop wrangle a large inflatable dinosaur down the street during the Independence Day Parade in Fairfax, Virginia July 4, 2015. Americans marched in star-spangled parades, ran relay races, gathered for fireworks shows and crowned a new world hot dog eating champion as they celebrated Independence Day in traditional style on Saturday. (Photo by Jonathan Ernst/Reuters)