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

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Why does smoke from incense or cigarettes not (usually) set off smoke alarms?

131 upvotes

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How severe an environmental impact do missions to space have here on Earth?

51 upvotes

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Have sea-levels ever been high enough to link the Caspian Depression with the Black Sea, and therefore the world's wider oceans?

9 upvotes

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Why does ethyl alcohol evaporate out of your beer/wine/booze so slowly?

7 upvotes

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The Earth's gravity is strong enough to keep orbiting spaceships/stations from flying off into space, so why do people on board seem not to experience it? Shouldn't they be drawn down towards the Earth-side of the spacecraft?

5 upvotes

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I keep getting a "phantom" vibration in my leg, near where I normally keep my cellphone, even when the phone isn't in the pocket. What's going on?

1 upvotes

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Why do humans naturally roll our eyes when we're incredulous, frustrated, or irritated with someone?

1 upvotes

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Why are there so few green flowers?

1 upvotes

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From where cometh the cheese bubbles? Why do some cheeses (such as Swiss Emmental) have bubbles in them, but other somewhat similar-tasting cheeses (such as medium-Cheddar) not have bubbles?

1 upvotes

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How is it that ceramic is so hard that it can actually be used to sharpen high-quality steel? Isn't it just made of clay? Shouldn't the steel just flake it away?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why does smoke from incense or cigarettes not (usually) set off smoke alarms?	131
How severe an environmental impact do missions to space have here on Earth?	51
Have sea-levels ever been high enough to link the Caspian Depression with the Black Sea, and therefore the world's wider oceans?	9
Why does ethyl alcohol evaporate out of your beer/wine/booze so slowly?	7
The Earth's gravity is strong enough to keep orbiting spaceships/stations from flying off into space, so why do people on board seem not to experience it? Shouldn't they be drawn down towards the Earth-side of the spacecraft?	5
I keep getting a "phantom" vibration in my leg, near where I normally keep my cellphone, even when the phone isn't in the pocket. What's going on?	1
Why do humans naturally roll our eyes when we're incredulous, frustrated, or irritated with someone?	1
Why are there so few green flowers?	1
From where cometh the cheese bubbles? Why do some cheeses (such as Swiss Emmental) have bubbles in them, but other somewhat similar-tasting cheeses (such as medium-Cheddar) not have bubbles?	1
How is it that ceramic is so hard that it can actually be used to sharpen high-quality steel? Isn't it just made of clay? Shouldn't the steel just flake it away?	1