--- title: "Meaning & Key Takeaway of: If you represent the Earth's lifetime by…" description: "\"If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second ..." image: "https://sms4smile.com/quotes/i/5cc/martin-rees-3002_21st-century_if-you-represent-the-earth-s-lifetime-by_430372.jpg" --- # If you represent the Earth's lifetime by a single year… ![“If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second in June - a tiny fraction of the year. But even in this concertinaed cosmic perspective, our century is very, very special: the first when humans…” quote by Martin Rees](https://sms4smile.com/quotes/i/5cc/martin-rees-3002_21st-century_if-you-represent-the-earth-s-lifetime-by_430372.jpg) [Download](https://sms4smile.com/quotes/i/5cc/martin-rees-3002_21st-century_if-you-represent-the-earth-s-lifetime-by_430372.jpg) [Open image](https://sms4smile.com/quotes/i/5cc/martin-rees-3002_21st-century_if-you-represent-the-earth-s-lifetime-by_430372.jpg) > “If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second in June - a tiny fraction of the year. But even in this concertinaed cosmic perspective, our century is very, very special: the first when humans can change themselves and their home planet.” [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Humanity’s brief moment in cosmic time makes our current era uniquely capable of altering both ourselves and Earth, highlighting profound responsibility. **In simple terms:** We have a rare chance to change ourselves and the planet. Key Takeaway Recognize and act on our unique responsibility. Themes responsibility environment human agency cosmic perspective future generations Mood urgent inspirational thought‑provoking Type environmental ethical philosophical When to use this quote - policy making - education reform - climate activism - technological innovation - personal lifestyle changes Key Concepts ethics planetary stewardship anthropocene Questions to Reflect On - How can individuals influence planetary change? - What responsibilities arise from this unique epoch? A Different Perspective Our impact may be limited by political and economic constraints. ★ ★ ★ ★ ★ No ratings yet [Change](https://sms4smile.com/quotes/about/change/) [December](https://sms4smile.com/quotes/about/december/) [Earth](https://sms4smile.com/quotes/about/earth/) [Home](https://sms4smile.com/quotes/about/home/) [Humans](https://sms4smile.com/quotes/about/humans/) [June](https://sms4smile.com/quotes/about/june/) [Lifetime](https://sms4smile.com/quotes/about/lifetime/) [Perspective](https://sms4smile.com/quotes/about/perspective/) [Planet](https://sms4smile.com/quotes/about/planet/) ## Related quotes > [“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. 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But it should end…](https://sms4smile.com/quotes/jeff-goodell/the-end-of-coal-in-appalachia-doesn-t-mean-that-america-is-running/) [Jeff Goodell](https://sms4smile.com/quotes/author/jeff-goodell/) > [I took my first acting class at age 6 because I found out that's what Carol Burnett was doing - acting. Also she had…](https://sms4smile.com/quotes/christine-lakin/i-took-my-first-acting-class-at-age-6-because-i-found-out-that-s-what/) [Christine Lakin](https://sms4smile.com/quotes/author/christine-lakin/) > [A fragment is not a fraction but a whole piece](https://sms4smile.com/quotes/lyn-hejinian/a-fragment-is-not-a-fraction-but-a-whole-piece/) [Lyn Hejinian](https://sms4smile.com/quotes/author/lyn-hejinian/) > [If you are a great news organization, you can't have the best obtainable version of the truth if your vision and your scale is…](https://sms4smile.com/quotes/carl-bernstein/if-you-are-a-great-news-organization-you-can-t-have-the-best/) [Carl Bernstein](https://sms4smile.com/quotes/author/carl-bernstein/) > [The still image continues to have a ton of strength. An image taken out of context from one fraction of a second to the…](https://sms4smile.com/quotes/jill-greenberg/the-still-image-continues-to-have-a-ton-of-strength-an-image-taken/) [Jill Greenberg](https://sms4smile.com/quotes/author/jill-greenberg/) ## More by Martin Rees > [A monkey is unaware that atoms exist. Likewise, our brainpower may not stretch to the deepest aspects of reality. The bedrock nature of space…](https://sms4smile.com/quotes/martin-rees/a-monkey-is-unaware-that-atoms-exist-likewise-our-brainpower-may-not/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [When scientists are asked what they are working on, their response is seldom 'Finding the origin of the universe' or 'Seeking to cure cancer.'…](https://sms4smile.com/quotes/martin-rees/when-scientists-are-asked-what-they-are-working-on-their-response-is/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [The advance of science spares us from irrational dread.](https://sms4smile.com/quotes/martin-rees/the-advance-of-science-spares-us-from-irrational-dread/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [“The Sun contains about a thousand times more mass than Jupiter. If it were cold, gravity would squeeze it a million times denser than…](https://sms4smile.com/quotes/martin-rees/the-sun-contains-about-a-thousand-times-more-mass-than-jupiter-if-it/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [“We, and the visible universe around us, may exist only because of a difference in the ninth decimal place between the numbers of quarks…](https://sms4smile.com/quotes/martin-rees/we-and-the-visible-universe-around-us-may-exist-only-because-of-a/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [Crucial to science education is hands-on involvement: showing, not just telling; real experiments and field trips and not just 'virtual reality.'](https://sms4smile.com/quotes/martin-rees/crucial-to-science-education-is-hands-on-involvement-showing-not-just/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [I have no religious belief myself, but I don't think we should fight about it. In particular, I think that we should not rubbish…](https://sms4smile.com/quotes/martin-rees/i-have-no-religious-belief-myself-but-i-don-t-think-we-should-fight/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [“More energy is needed to rise a millimetre above a neutron star's surface than to break completely free of Earth's gravity. A pen dropped…](https://sms4smile.com/quotes/martin-rees/more-energy-is-needed-to-rise-a-millimetre-above-a-neutron-star-s/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [The next humans to walk on the moon may be Chinese. Only China seems to have the resources, the dirigiste government, and the willingness…](https://sms4smile.com/quotes/martin-rees/the-next-humans-to-walk-on-the-moon-may-be-chinese-only-china-seems/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [If we ever established contact with intelligent life on another world, there would be barriers to communication. First, they would be many light years…](https://sms4smile.com/quotes/martin-rees/if-we-ever-established-contact-with-intelligent-life-on-another-world/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [There is an ever-widening gap between what science allows and what we should actually do. There are many doors science can open that should…](https://sms4smile.com/quotes/martin-rees/there-is-an-ever-widening-gap-between-what-science-allows-and-what-we/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [An insect is more complex than a star..and is a far greater challenge to understand.](https://sms4smile.com/quotes/martin-rees/an-insect-is-more-complex-than-a-star-and-is-a-far-greater-challenge/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [The physicist is like someone who's watching people playing chess and, after watching a few games, he may have worked out what the moves…](https://sms4smile.com/quotes/martin-rees/the-physicist-is-like-someone-who-s-watching-people-playing-chess-and/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [We are 'nuclear waste' from the fuel that makes stars shine; indeed, each of us contains atoms whose provenance can be traced back to…](https://sms4smile.com/quotes/martin-rees/we-are-nuclear-waste-from-the-fuel-that-makes-stars-shine-indeed-each/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) > [Just as there are many Jews who keep the Friday ritual in their home despite describing themselves as atheists, I am a 'tribal Christian,'…](https://sms4smile.com/quotes/martin-rees/just-as-there-are-many-jews-who-keep-the-friday-ritual-in-their-home/) [Martin Rees](https://sms4smile.com/quotes/author/martin-rees/) [Explore all 143 Martin Rees quotes ](https://sms4smile.com/quotes/author/martin-rees/) ## More 21st century quotes > [The young people today are the 21st century.](https://sms4smile.com/quotes/martin-scorsese/the-young-people-today-are-the-21st-century/) [Martin Scorsese](https://sms4smile.com/quotes/author/martin-scorsese/) > [“You know it’s the 21st Century when someone TEXTS you from the washroom to ask you to bring them a roll of toilet paper.”](https://sms4smile.com/quotes/comic-strip-mama/you-know-it-s-the-21st-century-when-someone-texts-you-from-the/) Comic Strip Mama > [“I am made of a thousand ghosts. Only you can shoot me down.”](https://sms4smile.com/quotes/bella-james/i-am-made-of-a-thousand-ghosts-only-you-can-shoot-me-down/) Bella James > [Like many others, I have deep misgivings about the state of education in the United States. Too many of our students fail to graduate…](https://sms4smile.com/quotes/bill-gates/like-many-others-i-have-deep-misgivings-about-the-state-of-education/) [Bill Gates](https://sms4smile.com/quotes/author/bill-gates/) > [Undeniably, character does count for our citizens, out communities, and our Nation, and this week we celebrate the importance of character in our individual…](https://sms4smile.com/quotes/william-j-clinton/undeniably-character-does-count-for-our-citizens-out-communities-and/) [William J. Clinton](https://sms4smile.com/quotes/author/william-j-clinton/) > [The hope of Internet anarchists was that repressive governments would have only two options: accept the Internet with its limitless possibilities of spreading information,…](https://sms4smile.com/quotes/peter-singer/the-hope-of-internet-anarchists-was-that-repressive-governments-would/) [Peter Singer](https://sms4smile.com/quotes/author/peter-singer/) > [Maybe we need a tax credit for the poorest Americans to buy a laptop. Now, maybe that's wrong, maybe that's expensive, maybe we can't…](https://sms4smile.com/quotes/newt-gingrich/maybe-we-need-a-tax-credit-for-the-poorest-americans-to-buy-a-laptop/) [Newt Gingrich](https://sms4smile.com/quotes/author/newt-gingrich/) > [The 20th century has been marked by cynicism, selfishness, greed, and the desire to please, all without changing the status quo. In the 21st…](https://sms4smile.com/quotes/scar-arias/the-20th-century-has-been-marked-by-cynicism-selfishness-greed-and/) [Óscar Arias](https://sms4smile.com/quotes/author/scar-arias/) > [I firmly believe that the mission of religion in the 21st century must be to contribute concretely to the peaceful coexistence of humankind.](https://sms4smile.com/quotes/daisaku-ikeda/i-firmly-believe-that-the-mission-of-religion-in-the-21st-century/) [Daisaku Ikeda](https://sms4smile.com/quotes/author/daisaku-ikeda/) > [Facebook, Twitter...Welcome to The 21st Century...Where Someone can stalk you without leaving the couch!..](https://sms4smile.com/quotes/anonymous/facebook-twitter-welcome-to-the-21st-century-where-someone-can-stalk/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [Human Race is all over universe! And I am the first person to inform you. I am the most influential person of this decade…](https://sms4smile.com/quotes/ashwani-kumar-ojha/human-race-is-all-over-universe-and-i-am-the-first-person-to-inform/) [Ashwani Kumar Ojha](https://sms4smile.com/quotes/author/ashwani-kumar-ojha/) > [Like the railroads that brought us together in the 19th century, these trails will bring us together in the 20th and 21st centuries. (at…](https://sms4smile.com/quotes/hillary-clinton/like-the-railroads-that-brought-us-together-in-the-19th-century-these/) [Hillary Clinton](https://sms4smile.com/quotes/author/hillary-clinton/) > [What I love about making albums in the 21st century is that so few people buy albums! I can make an album without any…](https://sms4smile.com/quotes/moby/what-i-love-about-making-albums-in-the-21st-century-is-that-so-few/) [Moby](https://sms4smile.com/quotes/author/moby/) > [As a former Apollo astronaut, I think it's safe to say that SpaceX and the other commercial developers embody the 21st century version of…](https://sms4smile.com/quotes/rusty-schweickart/as-a-former-apollo-astronaut-i-think-it-s-safe-to-say-that-spacex-and/) [Rusty Schweickart](https://sms4smile.com/quotes/author/rusty-schweickart/) > [The computer provides the only way to give students a real foundation in 21st-century skills.](https://sms4smile.com/quotes/nicholas-negroponte/the-computer-provides-the-only-way-to-give-students-a-real-foundation/) [Nicholas Negroponte](https://sms4smile.com/quotes/author/nicholas-negroponte/) Browse all 771 21st century quotes ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second in June - a tiny fraction of the year. 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