A rider picks up a hada, a traditional Tibetan ceremonial scarf, during a horse racing event of the 18th Mount Qomolangma culture and tourism festival in Xigaze, southwest China's Tibet Autonomous Region on June 20, 2023. (Photo by Sun Fei/Xinhua News Agency/Alamy Live News)

Visitors enjoy a walk accross a suspension bridge for the pedestrians that is the longest such construction in the world shortly after its official opening at a mountain resort in Dolni Morava, Czech Republic, Friday, May 13, 2022. The 721-meter (2,365 feet) long bridge is built at the altitude of more than 1,100 meters above the sea level. It connects two ridges of the mountains up to 95 meters above a valley between them. (Photo by David W. Cerny/Reuters)

A military helicopter flies over Tel Aviv after lifting off from the Tel Aviv Sourasky Medical Center (Ichilov), amid the ongoing conflict between Israel and the Palestinian Islamist group Hamas, Israel on December 27, 2023. (Photo by Clodagh Kilcoyne/Reuters)

Students of Rabindrabharati University apply colour dust or Gulal on each other during a celebration the festival of colour Holi in Kolkata, Eastern India, 23 March 2024. Holi, also known as the Festival of Colors, is an ancient Hindu festival symbolizing the victory of good over evil and marking the arrival of spring. It is observed with joyful gatherings during which revelers cover each other in colored powders. (Photo by Piyal Adhikary/EPA/EFE)

People dressed in traditional costumes sing Christmas carols as they gather to celebrate Orthodox Christmas at a compound of the National Architecture museum in Kyiv, Ukraine on January 7, 2022. (Photo by Valentyn Ogirenko/Reuters)

Dancers perform at the Harajuku Omotesando Super Yosakoi Dance festival in Shibuya, Tokyo on August 27, 2022. Super Yosakoi festival, is a two day festival that sees thousands of dancers, in hundreds of teams, energetically perform this unique Japanese dance style that combines traditional and more modern elements of movement and costume. (Photo by Damon Coulter/SOPA Images/Rex Features/Shutterstock)

Promotional models use their smartphones during their break at the Global Mobile Internet Conference in Beijing May 6, 2014. Mobile Internet industry executives, developers and investors from more than 30 countries took part in the Global Mobile Internet Conference in Beijing, the organiser said. (Photo by Kim Kyung-Hoon/Reuters)

“Cassowaries are large, flightless birds related to emus and (more distantly) to ostriches, rheas, and kiwis”, writes Olivia Judson in the September issue of National Geographic magazine. How large? People-size: Adult males stand well over five foot five and top 110 pounds. Females are even taller, and can weigh more than 160 pounds. Dangerous when roused, they’re shy and peaceable when left alone. But even birds this big and tough are prey to habitat loss. The dense New Guinea and Australia rain forests where they live have dwindled. Today cassowaries might number 1,500 to 2,000. And because they help shape those same forests – by moving seeds from one place to another – “if they vanish”, Judson writes, “the structure of the forest would gradually change” too. (Photo by Christian Ziegler/National Geographic)