'If there is poetry in my book about the sea, it is not because I deliberately put it there, but because no one could write truthfully about the sea and leave out the poetry.'

- Marine biologist and author Rachel Carson (1907-1964)

Rachel Carson's 'Silent Spring' exposed the harmful effects of pesticides on food

The 1962 book warned against the use of DDT, a pesticide often sprayed over fields of crops, cautioning that it could be harmful if ingested in excessive amounts by humans. Some credit Carson’s book with inspiring the modern environmental movement and with encouraging the US to establish the Environmental Protection Agency in 1970 and ban the domestic sale of DDT in 1972. (Some readers may experience a paywall.)

'The bounty of nature is also one of the deep needs of man.'

- Lady Bird Johnson (1912-2007)

Rachel Carson didn't argue for wholly organic farming

Her 1962 book, “Silent Spring,” inspired many people to consider the chemicals used to grow their food, but Carson didn’t think that manufactured fertilizers needed to be banned from farming, writing that “The ultimate answer is to use less toxic chemicals so that the public hazard from their misuse is greatly reduced.” When she testified to Congress in 1963, she said, “I think chemicals do have a place.”

'Men and nature must work hand in hand. The throwing out of balance of the resources of nature throws out of balance also the lives of men.'

- President Franklin D. Roosevelt (1882–1945)

Read 10 of the best quotes about nature from David Attenborough

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.

Hear Carl Sagan reflect on the smallness of humanity

'We are more fulfilled when we are involved in something bigger than ourselves.'

- Astronaut John Glenn (1921–2016)

'The urge to explore has propelled evolution since the first water creatures reconnoitered the land. Like all living systems, cultures cannot remain static; they evolve or decline. They explore or expire.'

- Astronaut Buzz Aldrin (1930-present)

'Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world.'

- Albert Einstein

'We are cups, constantly and quietly being filled. The trick is, knowing how to tip ourselves over and let the beautiful stuff out.'

- Science fiction writer Ray Bradbury

David Attenborough reflects on some of his most moving natural encounters

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.

National Geographic presents how to protect the oceans

What can we do to protect and preserve the world's oceans? Be inspired by spectacular wildlife footage from National Geographic while learning key strategies.

'Every day sees humanity more victorious in the struggle with space and time.'

- Radio inventor Guglielmo Marconi

'How wonderful it is that nobody need wait a single moment before starting to improve the world.' - Anne Frank

Polish chemist and physicist Marie Curie (1867–1934) on learning

“Nothing in life is to be feared; it is only to be understood. Now is the time to understand more, so that we may fear less."

Founder of The Ocean Cleanup explains the case for cleaning oceans

Removing trash from the oceans not only saves wildlife, it may save human lives, too. The CEO and founder of The Ocean Cleanup explains how existing plastic pollution harms us and get harder to clean up over time.

'I love quotations because it is a joy to find thoughts one might have, beautifully expressed with much authority by someone recognized wiser than oneself.'

- Actress and singer Marlene Dietrich (1901-1992)

Tracing the history of the philosophy of human extinction

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 earth is rude, silent, incomprehensible at first, Nature is rude and incomprehensible at first, Be not discouraged, keep on, there are divine things well envelop'd.'

- Poet Walt Whitman (1819-1892)

'When you're climbing Mount Everest, nothing is easy. You just take one step at a time, never look back and always keep your eyes glued to the top.'

- Author Jacqueline Susann (1918-1974)

'On the return trip home, gazing through 240,000 miles of space toward the stars and the planet from which I had come, I suddenly experienced the universe as intelligent, loving, harmonious..'

-Apollo 14 astronaut Edgar Mitchell, in "The Way of the Explorer"

'May your future be limited only by your dreams.'

- Teacher and astronaut Christa McAuliffe (1948-1986)

'I would rather that my spark should burn out in a brilliant blaze than it should be stifled by dry-rot ... The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time.'

- Author Jack London (1876 - 1916)

A quote from Van Gogh

"Find things beautiful as much as you can, most people find too little beautiful."

'The true measure of all our actions is how long the good in them lasts.'

- Queen Elizabeth II (1926-2022)

'There cannot be mental atrophy in any person who continues to observe, to remember what he observes, and to seek answers for his unceasing hows and whys about things.'

-Alexander Graham Bell (1847-1922)

'Fear of life closes off more opportunities for us than fear of death ever does.'

- Actress Agnes Moorehead (1900–1974)

'Most of man's problems upon this planet, in the long history of the race, have been met and solved either partially or as a whole by experiment based on common sense and carried out with courage.'

-Frances Perkins (1880-1965), first female member of US Cabinet

English chemist Rosalind Franklin (1920 - 1958) on the importance of science

"Science and everyday life cannot and should not be separated. Science, for me, gives a partial explanation of life."

A quote by award-winning actor Tom Hanks

"We are still in the position of waking up and having a choice. Do I make the world better today somehow, or do I not bother?"

'There are no passengers on Spaceship Earth. We are all crew.'

- Philosopher Marshall McLuhan (1911-1980)

How humans are engineering the planet

One fact about our time is becoming increasingly well-known. No matter how far you travel, no matter in which direction you point, there is nowhere on Earth that remains free from the traces of human activity.

This Harvard philosophy professor suggests we should rethink our relationship with animals

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.

'The arts and sciences are avatars of human creativity. It's our attempt to influence things, the universe internal to ourselves and external to us.'

- Mae Jemison (1956-present), the first Black woman in space

A quote by scientist Nikola Tesla

"The scientific man does not aim at an immediate result ... His duty is to lay the foundation for those who are to come, and point the way."