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1. • Mars

     • Mars might have been habitable between 3.8 and 3.1 billion years ago—right around the time that life got started on Earth.
     www.popsci.com/mars-habitable/

     Mars was probably habitable for longer than we thought

2. People also ask

   How many planets remained habitable for 3 billion years?

   • In fact, most planets that stayed habitable at least once, did so fewer than ten times out of 100. On nearly every occasion in the simulation when a planet remained habitable for 3 billion years, it was partly down to luck. 1,000 different planets were generated randomly and run twice. Green circles show habitability for 3 billion years.

   Earth's Habitability Today Is Basically Due to Luck, Millions of

   www.sciencealert.com/are-we-just-lucky-that-earth-has-stayed-habitable-for-billions-of-years

   See all results for this question

   How long does a planet stay habitable?

   • On nearly every occasion in the simulation when a planet remained habitable for 3 billion years, it was partly down to luck. 1,000 different planets were generated randomly and run twice. Green circles show habitability for 3 billion years. (Toby Tyrrell) At the same time, luck by itself was shown to be insufficient.

   Earth's Habitability Today Is Basically Due to Luck, Millions of

   www.sciencealert.com/are-we-just-lucky-that-earth-has-stayed-habitable-for-billions-of-years

   See all results for this question

   How lucky has Earth stayed habitable for billions of years?

   • Earth has stayed habitable for billions of years – exactly how lucky did we get? It took evolution 3 or 4 billion years to produce Homo sapiens. If the climate had completely failed just once in that time then evolution would have come to a crashing halt and we would not be here now.

   Earth has stayed habitable for billions of years – exactly how lucky

   theconversation.com/earth-has-stayed-habitable-for-billions-of-years-exactly-how-lucky-did-we-get-153416

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   Is a planet habitable all 100 times?

   • The simulation results give a definite answer to this habitability problem, at least in terms of the importance of feedbacks and luck. It was very rare (in fact, just one time out of 100,000) for a planet to have such strong stabilising feedbacks that it stayed habitable all 100 times, irrespective of the random climate events.

   It’s a cosmic miracle that life on Earth’s lasted this long

   www.popsci.com/story/science/earth-habitable-probability/

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   Are green circles habitable for 3 billion years?

   • Green circles show habitability for 3 billion years. (Toby Tyrrell) At the same time, luck by itself was shown to be insufficient. Planets that were specially designed to have no feedbacks at all, never stayed habitable; random walks, buffeted around by climate events, never lasted the course.

   Earth's Habitability Today Is Basically Due to Luck, Millions of

   www.sciencealert.com/are-we-just-lucky-that-earth-has-stayed-habitable-for-billions-of-years

   See all results for this question

   Did Venus have a habitable environment?

   • Here’s how it works. The hellish planet Venus may have had a perfectly habitable environment for 2 to 3 billion years after the planet formed, suggesting life would have had ample time to emerge there, according to a new study. In 1978, NASA's Pioneer Venus spacecraft found evidence that the planet may have once had shallow oceans on its surface.

   Venus May Have Supported Life Billions of Years Ago | Space

   www.space.com/planet-venus-could-have-supported-life.html

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3. theconversation.com › earth-has-stayed-habitableEarth has stayed habitable for billions of years – exactly ...

   theconversation.com › earth-has-stayed-habitable

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   Jan 19, 2021 · In fact, most planets that stayed habitable at least once, did so fewer than ten times out of 100. On nearly every occasion in the simulation when a planet remained habitable for 3 billion...

   • Author: Toby Tyrrell

4. www.sciencealert.com › are-we-just-lucky-thatEarth's Habitability Today Is Basically Due to Luck, Millions ...

   www.sciencealert.com › are-we-just-lucky-that

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   Jan 20, 2021 · In fact, most planets that stayed habitable at least once, did so fewer than ten times out of 100. On nearly every occasion in the simulation when a planet remained habitable for 3 billion years, it was partly down to luck. 1,000 different planets were generated randomly and run twice. Green circles show habitability for 3 billion years. (Toby ...

5. science.nasa.gov › universe › search-for-lifeBeginnings: Life on Our World and Others - NASA Science

   science.nasa.gov › universe › search-for-life

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   Jun 13, 2023 · With more than 5,000 exoplanets confirmed, and likely billions more in our Milky Way galaxy, possible places where other life might reside have skyrocketed in recent years. And with more sophisticated telescopes scanning the sky and in development, we have better tools than ever to understand these distant worlds.

6. Videos

   • 

     2:21

     youtube.com

     What Is the Habitable Zone?

     26 Apr 2021

     321.7K views

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     8:04

     youtube.com

     The Most Habitable Places for Life in Space

     3 Apr 2014

     2.2M views

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     12:41

     youtube.com

     Scientists Discover Planets More Habitable Than Earth

     20 May 2023

     6M views

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7. en.wikipedia.org › wiki › List_of_potentiallyList of potentially habitable exoplanets - Wikipedia

   en.wikipedia.org › wiki › List_of_potentially

   • Cached

   The following list includes some of the potentially habitable exoplanets discovered so far. It is mostly based on estimates of habitability by the Habitable Worlds Catalog (HWC), and data from the NASA Exoplanet Archive.

   Object	Star	Star Type	Mass (m ⊕)
   Earth (reported for reference)	Sun	G2V	1.00
   Venus (reported for reference)	Sun	G2V	0.815
   Mars (reported for reference)	Sun	G2V	0.107
   Gliese 12 b	Gliese 12	M4V	0.88+0.39 −0.26

   See full list on en.wikipedia.org

8. www.space.com › planet-venus-could-have-supportedVenus May Have Supported Life Billions of Years Ago | Space

   www.space.com › planet-venus-could-have-supported

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   Sep 23, 2019 · The hellish planet Venus may have had a perfectly habitable environment for 2 to 3 billion years after the planet formed, suggesting life would have had ample time to emerge there,...

9. news.harvard.edu › gazette › storyMars may have been habitable much more recently than thought

   news.harvard.edu › gazette › story

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   4 days ago · The “when” question in particular has driven researchers in Harvard’s Paleomagnetics Lab in the Department of Earth and Planetary Sciences. A new paper in Nature Communications makes their most compelling case to date that Mars’ life-enabling magnetic field could have survived until about 3.9 billion years ago, compared with previous ...

10. www.popsci.com › story › scienceIt’s a cosmic miracle that life on Earth’s lasted this long

    www.popsci.com › story › science

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    Jan 26, 2021 · Planets that were specially designed to have no feedbacks at all, never stayed habitable; random walks, buffeted around by climate events, never lasted the course. This overall result, that ...