At a 1986 chimpanzee research conference organized by Jane Goodall, she transitioned from more than two decades of being a researcher to becoming an activist.

For some great apes, the threat of human-borne diseases outweighs poaching or habitat loss. This article details the danger of reverse zoonoses, which refers to diseases that spread from humans to animals.

On the border between Rwanda and the modern-day Democratic Republic of the Congo, Attenborough used specific vocalizations and behaviors to approach a female gorilla peacefully, only to have two of her children lie down on him. Through a comical exchange, the incident helps show the creatures to be the opposite of the aggressive, violent stereotypes about them.

The doctor's institute was not amused by a cartoon by Gary Larson that used her name, sending the "Far Side" author a cease and desist letter. However, Goodall thought the cartoon was funny and rescinded the letter. Goodall and Larson would go on to become friends and work together.

The UN's highest environmental honor celebrated Attenborough as "one of the leading voices of the global environmental movement." For at least four decades, he collaborated with the UN Environment Programme by advocating for "efforts to counter the climate crisis, biodiversity loss and pollution" and addressing "world leaders at the UN Climate Change Conference" in 2021.

In research published in 2021, scientists reported discovering cases of leprosy in wild chimpanzees from Guinea-Bissau and the Ivory Coast—marking the first time the disease has been found in any nonhuman species in Africa. They confirmed that leprosy was the cause of the deformities by testing the animals' poop for the presence of the disease-causing bacteria.

Believing he was "experiencing the untouched natural world" in his early documentary series, Attenborough has admitted that many of his assumptions about human action were incorrect. It was not until attending a 2004 lecture on greenhouse gases and global temperatures that he became convinced of the science.

In 2019, 16-year-old climate activist Greta Thunberg took the Davos stage to sharply criticize global leaders for failing to act on climate change, warning that incremental promises were meaningless without immediate, systemic action.

Researchers believe the virus crossed from chimpanzees to humans through bushmeat practices in the early 20th century, with genetic studies suggesting the most recent common ancestor of the HIV-1 M group, which is responsible for the global AIDS pandemic, emerged around 1910–1930 in Léopoldville (now Kinshasa) in the Belgian Congo.

G. Clifford Prout founded the Society for Indecency to Naked Animals, saying that animal nudity was rude and immoral. The campaign continued for years until CBS employees realized Prout was actually a comedian named Buck Henry.

The legendary natural historian has had more direct encounters with wildlife than most people in history. As he turned 99, the Englishman recounts his favorite encounters with marine life, from whales to capuchin monkeys in mangroves. Despite the obstacles the environment faces, Attenborough believes in nature's resilience.

Christine Korsgaard, a professor of philosophy at Harvard, wrote a book arguing that humans are not more important than other animals and that we should improve our treatment of them. In her view, we have a duty to value the life of our fellow creatures not just for their utility, but for their existence as sentient and conscious beings.

In 2025, won the Outstanding Daytime Personality, Non-Daily category at 99 for his work documenting a group of apes in the jungles of Sumatra, Indonesia. The previous record had been held by Dick Van Dyke, who won at 98 for his guest appearance on "Days of Our Lives" in 2024.

- Jane Addams (1860-1935)

Throughout his career, Attenborough's storytelling style framed nature as the stage where plants and animals were characters that audiences could connect with and become emotionally attached to. Before the breakout success of "Life on Earth" and working full-time on making programs about the natural world, Attenborough spent a decade in executive roles responsible for overseeing content on BBC channels.

On International Human Rights Day, Roosevelt addressed a TV audience to explain the importance of the Declaration of Human Rights. She discusses her work and plans to spread information about the United Nations' efforts.

"Change, by its very nature, is threatening but it is also often productive."

When the Daughters of the American Revolution refused to allow Marian Anderson to perform at their Washington hall in 1939 because she was Black, Roosevelt publicly cut ties with the group. She worked to arrange an alternative outdoor concert for Anderson at the Lincoln Memorial, which drew a crowd of 75,000.

Global catastrophe is at the center of much contemporary debate over climate, war, science, technology, and more, and our period is marked by a lurking sense everything we know—including the human species—could end overnight. It wasn't always...

The groundbreaking discovery of the Antarctic ozone hole in the mid-1980s marked a critical turning point, galvanizing international action to address the ozone-depleting properties of chlorofluorocarbons, which had been identified about a decade earlier. This environmental crisis was brought vividly to public attention through media pieces like this one.

Giant pandas in locations outside their evolved latitudinal range (from southeast Asia to northern regions around Beijing) exhibit more sluggish behavior, even when they were born there. Researchers have observed that similar sensitivities to "photoperiods" (or time with light) impacts many animals, including birds, insects, and our pets.

From reflecting on the interconnectedness of life and humanity's shared responsibility to protect biodiversity to the power of young people in driving change and understanding nature's beauty and importance, this list highlights some of the most noteworthy things said by the famed natural historian.

Until the 1950s, humans believed whales were mute. Once American underwater surveillance systems caught their sounds during the Cold War, the perception of the creatures changed, leading humans to campaign for whaling bans and long-term conservation efforts. These captivating whale songs can be heard throughout the ocean.

Academics have long wondered if fairness is solely a concern of humans. In the largest meta-analysis to date, UC Berkeley researchers tested whether monkeys felt jealousy after receiving unequal rewards. The patterns showed low evidence for inequity aversion and instead frustration due to their expectations not being met by humans. These findings suggest that pursuing fairness and equality is uniquely human.

During the 1970s, Democrats and Republicans alike backed landmark environmental laws. Congress passed the Clean Air, Clean Water, and Endangered Species Acts with overwhelming bipartisan majorities—reflecting broad public agreement on protecting the environment.

Read the famous naturalist’s work from the late 1800s, detailing how he sought to draw comparisons between how animals and humans respond to fear. As part of that work, he exposed monkeys and a peccary to a stuffed snake and noted the animals’ hair-raising fear response.

At the 1851 Women's Rights Convention, Truth gave a speech that cemented her legacy, weaving together abolition and women's rights in remarks that became among the most quoted of the 19th century.

This choice to domesticate monkeys proved to be trickier than expected, and thus isn't a very appealing option for humans. Monkeys breed more slowly than other animals, while also being susceptible to diseases and challenging to contain.

Filled with many widely circulated quotes, the talk addresses people's tendency to focus only on their personal ideologies and perceptions of the world. Didion advocates for being an active participant in the world, rather than existing only in our own bubbles.