/u/I-suck-at-golf's posts in /r/askscience

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Why do we consider the Earth is positioned like a globe. Who decided the North Pole is "up" and how do we know that orientation is "upright" in our solar system?

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When I'm on an airliner, I never see clouds being sucked into the engine as we fly through clouds-why is that!

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Is there a time of day or year when the sun is only shining on the Pacific Ocean and both Asia and the US are in darkness?

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Why is Elon’s tunnel curved? Did the digging have to go around boulders?

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If the Florida peninsula didn’t exist, how would the ecology of the Gulf be different?

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If a healthy 190 lb person eats 3lbs of carefully weighed food and drink right before bed. Can that person wake up weighing more than 193lbs?

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What is the theoretical maximum number of humans possible on Earth? If you have a yeast culture in a closed system, theirs a max population based on size, resources, etc. Whats the number for humans?

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Instead of retiring the space shuttle, why not leave one attached to the ISS as extra living quarters and laboratory space?

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How does the Earths core stay molten for billions of years with no heat input?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do we consider the Earth is positioned like a globe. Who decided the North Pole is "up" and how do we know that orientation is "upright" in our solar system?	1
When I'm on an airliner, I never see clouds being sucked into the engine as we fly through clouds-why is that!	1
Is there a time of day or year when the sun is only shining on the Pacific Ocean and both Asia and the US are in darkness?	1
Why is Elon’s tunnel curved? Did the digging have to go around boulders?	1
If the Florida peninsula didn’t exist, how would the ecology of the Gulf be different?	1
If a healthy 190 lb person eats 3lbs of carefully weighed food and drink right before bed. Can that person wake up weighing more than 193lbs?	1
What is the theoretical maximum number of humans possible on Earth? If you have a yeast culture in a closed system, theirs a max population based on size, resources, etc. Whats the number for humans?	1
Instead of retiring the space shuttle, why not leave one attached to the ISS as extra living quarters and laboratory space?	1
How does the Earths core stay molten for billions of years with no heat input?	1