/u/[deleted]'s posts in /r/askscience

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We have noise canceling headphones. Can we make light canceling flashlights? Could we make a 'black' laser?

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Is it possible to create sound waves without the vibration of a physical object like a speaker?

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What is the ringing noise you hear when it's very quiet?

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Help the moderators out: Report comments and threads that are not fitting for /r/AskScience. It makes moderation much easier for us.

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Why do flowers smell nice to humans?

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Why do our voices crack when we sing higher than our range?

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Does widespread interracial breeding make us more racially diverse or more homogenous?

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Why do we lose bladder/bowel control in response to acute fear?

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Has there been any study on the impact of capsaicin on gut flora?

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When I'm sitting in a quiet room, why do things "click"?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
We have noise canceling headphones. Can we make light canceling flashlights? Could we make a 'black' laser?	73
Is it possible to create sound waves without the vibration of a physical object like a speaker?	73
What is the ringing noise you hear when it's very quiet?	72
Help the moderators out: Report comments and threads that are not fitting for /r/AskScience. It makes moderation much easier for us.	72
Why do flowers smell nice to humans?	72
Why do our voices crack when we sing higher than our range?	72
Does widespread interracial breeding make us more racially diverse or more homogenous?	72
Why do we lose bladder/bowel control in response to acute fear?	72
Has there been any study on the impact of capsaicin on gut flora?	72
When I'm sitting in a quiet room, why do things "click"?	71