--- title: "Meaning & Key Takeaway of: For the last forty-eight hours, Dr. Mary…" description: "\"“For the last forty-eight hours, Dr. Mary Caldwell had spent every waking second studying the signal the radio telescope had received. She was exhauste..." image: "https://sms4smile.com/quotes/i/f1a/a-g-riddle-5016_quote_for-the-last-forty-eight-hours-dr-mary-c_1405594.jpg" --- # For the last forty-eight hours, Dr. Mary Caldwell had… ![“For the last forty-eight hours, Dr. Mary Caldwell had spent every waking second studying the signal the radio telescope had received. She was exhausted, exhilarated, and sure of one thing: it was organized, a sign of intelligent life. Behind her, John Bishop,” quote by A.G. Riddle](https://sms4smile.com/quotes/i/f1a/a-g-riddle-5016_quote_for-the-last-forty-eight-hours-dr-mary-c_1405594.jpg) [Download](https://sms4smile.com/quotes/i/f1a/a-g-riddle-5016_quote_for-the-last-forty-eight-hours-dr-mary-c_1405594.jpg) [Open image](https://sms4smile.com/quotes/i/f1a/a-g-riddle-5016_quote_for-the-last-forty-eight-hours-dr-mary-c_1405594.jpg) > ““For the last forty-eight hours, Dr. Mary Caldwell had spent every waking second studying the signal the radio telescope had received. She was exhausted, exhilarated, and sure of one thing: it was organized, a sign of intelligent life. Behind her, John Bishop,”” [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. The protagonist believes the radio pattern is a deliberate, intelligent message, driving obsession and hope for contact. **In simple terms:** She thinks the signal is a sign of alien intelligence. Key Takeaway Stay vigilant for patterns that suggest intent. Themes science exploration obsession hope Mood excited tense Type literary speculative When to use this quote - astronomy research - night‑shift work - media briefings Key Concepts signal analysis intelligence detection human curiosity Questions to Reflect On - What evidence would convince you the signal is artificial? - How does obsession affect decision‑making? A Different Perspective The signal could be natural noise misinterpreted as intentional. ★ ★ ★ ★ ★ No ratings yet [Intelligent life](https://sms4smile.com/quotes/about/intelligent-life/) [John Bishop](https://sms4smile.com/quotes/about/john-bishop-4938203/) [Mary Caldwell](https://sms4smile.com/quotes/about/mary-caldwell-4938202/) [Radio Telescope](https://sms4smile.com/quotes/about/radio-telescope-4046800/) [Telescope Received](https://sms4smile.com/quotes/about/telescope-received-4938201/) ## Related quotes > [“A radio telescope works more like a light meter than a camera. You point it toward some fairly broad region of the sky, and…](https://sms4smile.com/quotes/carl-sagan/a-radio-telescope-works-more-like-a-light-meter-than-a-camera-you/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [The one way to discover about aliens is to tune your radio telescope and listen to the signals.](https://sms4smile.com/quotes/garik-israelian/the-one-way-to-discover-about-aliens-is-to-tune-your-radio-telescope/) [Garik Israelian](https://sms4smile.com/quotes/author/garik-israelian/) > [I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.](https://sms4smile.com/quotes/arthur-c-clarke/i-m-sure-the-universe-is-full-of-intelligent-life-it-s-just-been-too/) [Arthur C. Clarke](https://sms4smile.com/quotes/author/arthur-c-clarke/) > [Symbiosis is a much higher reflection of intelligent life.](https://sms4smile.com/quotes/frederick-lenz/symbiosis-is-a-much-higher-reflection-of-intelligent-life/) [Frederick Lenz](https://sms4smile.com/quotes/author/frederick-lenz/) > [“Like an alchemical wave sending ripples of love to every part of our being, once we become conscious of an intelligent life force existing…](https://sms4smile.com/quotes/atalina-m-homan/like-an-alchemical-wave-sending-ripples-of-love-to-every-part-of-our/) [Atalina M Homan](https://sms4smile.com/quotes/author/atalina-m-homan/) > [The surest sign that intelligent life exists somewhere else in the universe is that it has never tried to contact us.](https://sms4smile.com/quotes/young-siddiq-prince/the-surest-sign-that-intelligent-life-exists-somewhere-else-in-the/) [Young Siddiq Prince](https://sms4smile.com/quotes/author/young-siddiq-prince/) > [The question is not whether there is intelligent life out there, the question is, whether there is intelligent life down here. As long as…](https://sms4smile.com/quotes/jacque-fresco/the-question-is-not-whether-there-is-intelligent-life-out-there-the/) [Jacque Fresco](https://sms4smile.com/quotes/author/jacque-fresco/) > [Intelligent life on a planet comes of age when it first works out the reason for its own existence.](https://sms4smile.com/quotes/richard-dawkins/intelligent-life-on-a-planet-comes-of-age-when-it-first-works-out-the/) [Richard Dawkins](https://sms4smile.com/quotes/author/richard-dawkins/) > [I keep wondering if, say, there is intelligent life on other planets, the scientists argue that something like two percent of the other planets…](https://sms4smile.com/quotes/donald-barthelme/i-keep-wondering-if-say-there-is-intelligent-life-on-other-planets/) [Donald Barthelme](https://sms4smile.com/quotes/author/donald-barthelme/) > [A stunning survey of the latest evidence for intelligent life on Mars. Mac Tonnies brings a thoughtful, balanced and highly accessible approach to one…](https://sms4smile.com/quotes/herbie-brennan/a-stunning-survey-of-the-latest-evidence-for-intelligent-life-on-mars/) [Herbie Brennan](https://sms4smile.com/quotes/author/herbie-brennan/) > [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/) > [ \[In the Universe it may be that\] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet… ](https://sms4smile.com/quotes/anonymous/in-the-universe-it-may-be-that-primitive-life-is-very-common-and/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [The higher you go in a company, the less oxygen there is, so supporting intelligent life becomes difficult.](https://sms4smile.com/quotes/guy-kawasaki/the-higher-you-go-in-a-company-the-less-oxygen-there-is-so-supporting/) [Guy Kawasaki](https://sms4smile.com/quotes/author/guy-kawasaki/) > [As George Bernard Shaw observed: "All great truths begin as blasphemies." Yet I have to say, the idea that there is intelligent life elsewhere…](https://sms4smile.com/quotes/neale-donald-walsch/as-george-bernard-shaw-observed-all-great-truths-begin-as-blasphemies/) [Neale Donald Walsch](https://sms4smile.com/quotes/author/neale-donald-walsch/) > [The hardware and the software used in the Breakthrough project will be compatible with other telescopes around the world, so they too can search…](https://sms4smile.com/quotes/yuri-milner/the-hardware-and-the-software-used-in-the-breakthrough-project-will/) [Yuri Milner](https://sms4smile.com/quotes/author/yuri-milner/) ## More by A.G. Riddle > [“To this day I believe a person’s ideal first job is the one that reveals the most about them. Knowing who I was helped…](https://sms4smile.com/quotes/a-g-riddle/to-this-day-i-believe-a-person-s-ideal-first-job-is-the-one-that/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“We are far too uncivilized to possess the weapons we do.”](https://sms4smile.com/quotes/a-g-riddle/we-are-far-too-uncivilized-to-possess-the-weapons-we-do/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“THE GREATEST MYSTERY OF ALL TIME… THE HISTORY OF HUMAN ORIGINS… WILL BE REVEALED. 70,000 years ago, the human race almost went extinct. We…](https://sms4smile.com/quotes/a-g-riddle/the-greatest-mystery-of-all-time-the-history-of-human-origins-will-be/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“Empower them to run their own reports.”](https://sms4smile.com/quotes/a-g-riddle/empower-them-to-run-their-own-reports/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“When she needed to rest, she closed her eyes, refused to let her mind think, and instead focused on her breathing. She first forced…](https://sms4smile.com/quotes/a-g-riddle/when-she-needed-to-rest-she-closed-her-eyes-refused-to-let-her-mind/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“Science lacks something very important that religion provides: a moral code. Survival of the fittest is a scientific fact, but it is a cruel…](https://sms4smile.com/quotes/a-g-riddle/science-lacks-something-very-important-that-religion-provides-a-moral/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“The taps mimicked the theme song to The X-Files.”](https://sms4smile.com/quotes/a-g-riddle/the-taps-mimicked-the-theme-song-to-the-x-files/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“The human race is the biggest mass murderer of all time. Think about it: we’re hard-coded to survive. Even our ancient ancestors were driven…](https://sms4smile.com/quotes/a-g-riddle/the-human-race-is-the-biggest-mass-murderer-of-all-time-think-about/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“attended UNC-Chapel Hill, where he founded his first company with one of his childhood friends. He currently lives in Parkland, Florida and would love…](https://sms4smile.com/quotes/a-g-riddle/attended-unc-chapel-hill-where-he-founded-his-first-company-with-one/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“watched Yuri’s plan unfolded”](https://sms4smile.com/quotes/a-g-riddle/watched-yuri-s-plan-unfolded/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“Have faith and patience, Dr. Thomas. Time works miracles. We must have the courage to wait for them.” They”](https://sms4smile.com/quotes/a-g-riddle/have-faith-and-patience-dr-thomas-time-works-miracles-we-must-have/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“The man on the other end of the satellite phone looked up when the GPS coordinates flashed on his screen. He copied the location…](https://sms4smile.com/quotes/a-g-riddle/the-man-on-the-other-end-of-the-satellite-phone-looked-up-when-the/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“Lying there in silence, Elim thought about how quickly a person’s fate could change, how precious life and health are. He had walked into…](https://sms4smile.com/quotes/a-g-riddle/lying-there-in-silence-elim-thought-about-how-quickly-a-person-s-fate/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“Disasters are an opportunity for the worst of humanity. And the best.”](https://sms4smile.com/quotes/a-g-riddle/disasters-are-an-opportunity-for-the-worst-of-humanity-and-the-best/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) > [“When others are fearful, be greedy; when others are greedy, be fearful,”](https://sms4smile.com/quotes/a-g-riddle/when-others-are-fearful-be-greedy-when-others-are-greedy-be-fearful/) [A.G. Riddle](https://sms4smile.com/quotes/author/a-g-riddle/) [Explore all 101 A.G. Riddle quotes ](https://sms4smile.com/quotes/author/a-g-riddle/) ## More Intelligent life quotes > [The hardware and the software used in the Breakthrough project will be compatible with other telescopes around the world, so they too can search…](https://sms4smile.com/quotes/yuri-milner/the-hardware-and-the-software-used-in-the-breakthrough-project-will/) [Yuri Milner](https://sms4smile.com/quotes/author/yuri-milner/) > [As George Bernard Shaw observed: "All great truths begin as blasphemies." Yet I have to say, the idea that there is intelligent life elsewhere…](https://sms4smile.com/quotes/neale-donald-walsch/as-george-bernard-shaw-observed-all-great-truths-begin-as-blasphemies/) [Neale Donald Walsch](https://sms4smile.com/quotes/author/neale-donald-walsch/) > [The higher you go in a company, the less oxygen there is, so supporting intelligent life becomes difficult.](https://sms4smile.com/quotes/guy-kawasaki/the-higher-you-go-in-a-company-the-less-oxygen-there-is-so-supporting/) [Guy Kawasaki](https://sms4smile.com/quotes/author/guy-kawasaki/) > [ \[In the Universe it may be that\] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet… ](https://sms4smile.com/quotes/anonymous/in-the-universe-it-may-be-that-primitive-life-is-very-common-and/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [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/) > [A stunning survey of the latest evidence for intelligent life on Mars. Mac Tonnies brings a thoughtful, balanced and highly accessible approach to one…](https://sms4smile.com/quotes/herbie-brennan/a-stunning-survey-of-the-latest-evidence-for-intelligent-life-on-mars/) [Herbie Brennan](https://sms4smile.com/quotes/author/herbie-brennan/) > [I keep wondering if, say, there is intelligent life on other planets, the scientists argue that something like two percent of the other planets…](https://sms4smile.com/quotes/donald-barthelme/i-keep-wondering-if-say-there-is-intelligent-life-on-other-planets/) [Donald Barthelme](https://sms4smile.com/quotes/author/donald-barthelme/) > [Intelligent life on a planet comes of age when it first works out the reason for its own existence.](https://sms4smile.com/quotes/richard-dawkins/intelligent-life-on-a-planet-comes-of-age-when-it-first-works-out-the/) [Richard Dawkins](https://sms4smile.com/quotes/author/richard-dawkins/) > [The question is not whether there is intelligent life out there, the question is, whether there is intelligent life down here. As long as…](https://sms4smile.com/quotes/jacque-fresco/the-question-is-not-whether-there-is-intelligent-life-out-there-the/) [Jacque Fresco](https://sms4smile.com/quotes/author/jacque-fresco/) > [The surest sign that intelligent life exists somewhere else in the universe is that it has never tried to contact us.](https://sms4smile.com/quotes/young-siddiq-prince/the-surest-sign-that-intelligent-life-exists-somewhere-else-in-the/) [Young Siddiq Prince](https://sms4smile.com/quotes/author/young-siddiq-prince/) > [“Like an alchemical wave sending ripples of love to every part of our being, once we become conscious of an intelligent life force existing…](https://sms4smile.com/quotes/atalina-m-homan/like-an-alchemical-wave-sending-ripples-of-love-to-every-part-of-our/) [Atalina M Homan](https://sms4smile.com/quotes/author/atalina-m-homan/) > [Symbiosis is a much higher reflection of intelligent life.](https://sms4smile.com/quotes/frederick-lenz/symbiosis-is-a-much-higher-reflection-of-intelligent-life/) [Frederick Lenz](https://sms4smile.com/quotes/author/frederick-lenz/) > [I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.](https://sms4smile.com/quotes/arthur-c-clarke/i-m-sure-the-universe-is-full-of-intelligent-life-it-s-just-been-too/) [Arthur C. Clarke](https://sms4smile.com/quotes/author/arthur-c-clarke/) > [A society that destroys the environment that supports it, I would not consider to be intelligent life. It's like the cancer that ultimately kills…](https://sms4smile.com/quotes/frederick-lenz/a-society-that-destroys-the-environment-that-supports-it-i-would-not/) [Frederick Lenz](https://sms4smile.com/quotes/author/frederick-lenz/) > [“There is an enormous difference between life and intelligent life.”](https://sms4smile.com/quotes/marcelo-gleiser/there-is-an-enormous-difference-between-life-and-intelligent-life/) [Marcelo Gleiser](https://sms4smile.com/quotes/author/marcelo-gleiser/) [Browse all 109 Intelligent life quotes ](https://sms4smile.com/quotes/about/intelligent-life/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "“For the last forty-eight hours, Dr. Mary Caldwell had spent every waking second studying the signal the radio telescope had received. She was exhausted, exhilarated, and sure of one thing: it was organized, a sign of intelligent life. Behind her, John Bishop,”", "creator": { "@type": "Person", "name": "A.G. 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