Revellers celebrate the death of Britain's former prime minister Margaret Thatcher in Brixton, south London April 8, 2013. Margaret Thatcher, the “Iron Lady” who transformed Britain and inspired conservatives around the world by radically rolling back the state during her 11 years in power, died on Monday following a stroke. She was 87. (Photo by Olivia Harris/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)

Olivia Love-Hatlestad of Grayslake, IL., stands during the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25. (Photo by Drew Angerer/Getty Images)

In this composite image (L-R top row) Dok Haze, Douglas Child as Camp Dracula, Mongolian Laughing Boy, Tony Walls, Asia Sawika as Anastasia, (L-R bottom row) zombie bass guitar player Ozzy Jackson, sword swallower Hannibal Hellmurto, pickled person, Zoe Olivia Ellis and The Sinister Sisters, Steph Bates (L) and Steph Randall (R) pose for a photograph prior to a rehearsal of the Circus of Horrors' latest show The Night of the Zombie at the Wookey Hole Caves Theatre near Wells on October 23, 2014 in Somerset, England. (Photo by Matt Cardy/Getty Images)

Competitors stretch before taking part in day three of the World Irish Dancing Championships on March 26, 2018 in Glasgow, Scotland. The World Irish Dancing Championships are taking place in Glasgow this week at the Royal Concert Hall, with more than 14,500 dancers and supporters expected to travel to the championships which has run for more than forty years. (Photo by Jeff J. Mitchell/Getty Images)

Competitors take part in the International Medieval Combat Federation World Championships at Scone Palace on May 10, 2018 in Perth, Scotland. Thousands of visitors are expected to attend the crowning place of Scottish Kings, Scone Palace for the IMCF World Championships which has five hundred competitors and officials from all over the world, from the UK to as far afield as Australia, South Africa and Mexico. (Photo by Jeff J. Mitchell/Getty Images)

Rwandan woman drummers perform during the photocall for “The Book of Life” at the Edinburgh International Festival on August 11, 2022 in Edinburgh, Scotland.The Women Drummers of Rwanda,have broken with tradition to empower women to take part in a exhilarating and liberating of musical art-form. (Photo by Jeff J. Mitchell/Getty Images)

Performers take part in a procession as part of the Samhuinn Fire Festival on October 31, 2024 in Edinburgh, Scotland. The Samhuinn Fire Festival is a modern take on an ancient Celtic festival, marking the transition between summer and winter with fire-dancing, drums, acrobatics, and theatre performances. (Photo by Jeff J. Mitchell/Getty Images)