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

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Salt is used to melt snow on roads. But in the Olympics in Sochi right now they are using salt to harden snow and keep it from melting. How is this contradiction possible?

1688 upvotes

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Diamonds are just carbon, so what would it take to burn them?

1426 upvotes

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Is there any evidence that any wildlife species are evolving to avoid roads?

39 upvotes

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Why do some flowers (specifically the dandelions on my lawn right now) close up during the night and reopen in the morning?

6 upvotes

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When the Indian subcontinent collided with the Eurasian plate, it shoved the Himalayan Mountains into the air. But why didn't the subcontinent slide under the plate, the way they do in subduction zones everywhere else in the world?

3 upvotes

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Why are we stuck with archaic battery technology?

2 upvotes

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Why don't we have a cloned woolly mammoth yet?

1 upvotes

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How can some people die from hypothermia in cold water, like the Titanic tragedy, but other people can swim in large holes carved in the ice for fun, like in Finland and Russia?

1 upvotes

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Assuming a normal diet, an average human, and no modern dental care, what is the natural color of healthy human teeth?

1 upvotes

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If mercury is so poisonous, why do they allow it in mercury amalgams for dental cavities?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Salt is used to melt snow on roads. But in the Olympics in Sochi right now they are using salt to harden snow and keep it from melting. How is this contradiction possible?	1688
Diamonds are just carbon, so what would it take to burn them?	1426
Is there any evidence that any wildlife species are evolving to avoid roads?	39
Why do some flowers (specifically the dandelions on my lawn right now) close up during the night and reopen in the morning?	6
When the Indian subcontinent collided with the Eurasian plate, it shoved the Himalayan Mountains into the air. But why didn't the subcontinent slide under the plate, the way they do in subduction zones everywhere else in the world?	3
Why are we stuck with archaic battery technology?	2
Why don't we have a cloned woolly mammoth yet?	1
How can some people die from hypothermia in cold water, like the Titanic tragedy, but other people can swim in large holes carved in the ice for fun, like in Finland and Russia?	1
Assuming a normal diet, an average human, and no modern dental care, what is the natural color of healthy human teeth?	1
If mercury is so poisonous, why do they allow it in mercury amalgams for dental cavities?	1