In this Sunday, March 31, 2019, file photo, Marc Marquez, of Spain, drives his motorcycle during the Moto GP race at the Termas de Rio Hondo circuit in Argentina. The reigning MotoGP champion has dominated the Circuit of the Americas from the year it opened and the Repsol Honda rider comes back right back on top of the season standings in a chase for a sixth title in seven years. (Photo by Nicolas Aguilera/AP Photo/File)

A man lies in the sea grass at a beach on July 18, 2016 in Qingdao, Shandong Province of China. The enteromorpha prolifera spread on the beaches in Qingdao and were under clearing. (Photo by VCG/VCG via Getty Images)

English heavyweight Joe Joyce celebrates after defeating Christian Hammer during the WBC Silver Silver and WBO International Heavyweight Title fight between Joe Joyce and Christian Hammer at OVO Arena Wembley on July 02, 2022 in London, England. (Photo by Andrew Couldridge/Action Images via Reuters)

Arsenal's Gabriel Magalhaes reacts after the English Premier League soccer match between Arsenal and Southampton at the Emirates Stadium in London, Britain, 21 April 2023. (Photo by Neil Hall/EPA)

Adrienne Yip takes a picture of her Burmese mountain dog named “Walter”, beneath the cherry blossoms in peak bloom at the Tidal Basin with the Washington Monument seen behind, in Washington, DC, USA, 18 March 2024. Peak bloom, as defined when seventy percent of the cherry blossoms are open, is occuring this week. This year's peak bloom, beginning the 17th of March, is tied for the second earliest in history and is seen as a reflection of warming temperatures. (Photo by Michael Reynolds/EPA/EFE/Rex Features/Shutterstock)

Alice Bagnoli of Italy slaloms during the preliminary round of the 2023 IWWF World Waterski Championships at Sunset Lakes October, 13, 2023 in Lake County, Florida. (Photo by Johnny Hayward/Getty Images)

A boy takes his basset hound for a walk with a difference in Noosa, Australia on Saturday, March 9, 2024, during the annual Surf Dog Championships. (Photo by Roberta Holden/Solent News)

“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)