My best teachers were not the ones who knew all the answers, but those who were deeply excited by questions they couldn't answer.
Brian GreeneRead
Many different planets are many different distances from their host star; we find ourselves at this distance because if we were closer or farther away, the temperature would be hotter or colder, eliminating liquid water, an essential ingredient for our survival.
Interpretation
What this quote means
The quote explains the unique conditions on Earth that allow for the existence of liquid water, which is vital for life.
Brian Greene highlights the delicate balance of conditions necessary for life on Earth, specifically the planet's position relative to the Sun, which dictates the temperature and the presence of liquid water. This ideal distance ensures that Earth is neither too hot nor too cold, allowing for the existence of the essential ingredient for life: water. If conditions were different, life as we know it might not exist.
Themes
EarthLifeWaterTemperatureDistance
In practice
Example use cases
This quote can be used in a science class discussion about the conditions for life on other planets.
More from Brian Greene
All quotes →All mathematics is is a language that is well tuned, finely honed, to describe patterns; be it patterns in a star, which has five points that are regularly arranged, be it patterns in numbers like 2, 4, 6, 8, 10 that follow very regular progression.
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According to inflation, the more than 100 billion galaxies, sparkling throughout space like heavenly diamonds, are nothing but quantum mechanics writ large across the sky. To me, this realization is one of the greatest wonders of the modern scientific age.
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So: if you buy the notion that reality consists of the things in your freeze-frame mental image right now, and if you agree that your now is no more valid than the now of someone located far away in space who can move freely, then reality encompasses all of the events in spacetime.
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Black holes, we all know, are these regions where if an object falls in, it can't get out, but the puzzle that many struggled with over the decades is, what happens to the information that an object contains when it falls into a black hole. Is it simply lost?
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Physicists are more like avant-garde composers, willing to bend traditional rules... Mathematicians are more like classical composers.
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