/u/Chasen101's posts in /r/askscience

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What determines the altitude "sweet spot" that long distance planes fly at?

2296 upvotes

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If gravity is the weakest of the fundamental forces, why aren't celestial bodies movement, especially those with magnetic properties, governed by electromagnetism rather than gravity?

157 upvotes

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Why are train tracks laid on crushed stones/pebbles?

134 upvotes

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Does faster reproductive cycles go hand in hand with faster evolution? Do we know what factors make some animals evolve "quickly" while others remain relatively unchanged for tens of millions of years?

7 upvotes

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During a star's relatively stable period of life does its size fluctuate intermittently due to discrepancies in the balance between the crush of gravity and the force of nuclear fusion?

4 upvotes

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Is it more likely that two different species with the same generic trait are distantly related (post-genetic mutation) or that the same trait randomly mutated for both, separately?

2 upvotes

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Why am I seemingly immune to hangovers?

1 upvotes

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Why is Jupiter a gas giant and not at least partially rocky?

1 upvotes

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Scientists of AskScience, what cool science are you working on?

1 upvotes

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Why doesn't rain water fry power lines/junction boxes/transformers/etc?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What determines the altitude "sweet spot" that long distance planes fly at?	2296
If gravity is the weakest of the fundamental forces, why aren't celestial bodies movement, especially those with magnetic properties, governed by electromagnetism rather than gravity?	157
Why are train tracks laid on crushed stones/pebbles?	134
Does faster reproductive cycles go hand in hand with faster evolution? Do we know what factors make some animals evolve "quickly" while others remain relatively unchanged for tens of millions of years?	7
During a star's relatively stable period of life does its size fluctuate intermittently due to discrepancies in the balance between the crush of gravity and the force of nuclear fusion?	4
Is it more likely that two different species with the same generic trait are distantly related (post-genetic mutation) or that the same trait randomly mutated for both, separately?	2
Why am I seemingly immune to hangovers?	1
Why is Jupiter a gas giant and not at least partially rocky?	1
Scientists of AskScience, what cool science are you working on?	1
Why doesn't rain water fry power lines/junction boxes/transformers/etc?	1