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

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When I go for a 3 hour bike ride, where does most of my energy come from? Today's breakfast, last night's dinner, last week's dinner, etc.?

9 upvotes

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How do we know what specific chemicals are active in the brain (e.g. how can we say that there is a dopamine surge when a person does X)?

5 upvotes

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I heard a news story today saying how plants capture CO2 in the summer and release CO2 in the winter. How to do plants release CO2?

4 upvotes

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How does fainting compare to a blow to the head, in terms of brain safety?

4 upvotes

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Refrigerators have to displace heat when they work. But when microwaves and space heaters work, they don't have to displace cold. Could someone elaborate?

2 upvotes

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How do leeches survive (in a pond) before they grab onto a person?

2 upvotes

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Does alcohol tolerance affect BAC?

1 upvotes

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Biologically, what do diet pills do?

1 upvotes

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Are dinosaurs more closely related to birds, reptiles, or something else?

1 upvotes

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When sharks lose teeth, are they pushed out by newer ones, or do they fall out and are replaced months later?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When I go for a 3 hour bike ride, where does most of my energy come from? Today's breakfast, last night's dinner, last week's dinner, etc.?	9
How do we know what specific chemicals are active in the brain (e.g. how can we say that there is a dopamine surge when a person does X)?	5
I heard a news story today saying how plants capture CO2 in the summer and release CO2 in the winter. How to do plants release CO2?	4
How does fainting compare to a blow to the head, in terms of brain safety?	4
Refrigerators have to displace heat when they work. But when microwaves and space heaters work, they don't have to displace cold. Could someone elaborate?	2
How do leeches survive (in a pond) before they grab onto a person?	2
Does alcohol tolerance affect BAC?	1
Biologically, what do diet pills do?	1
Are dinosaurs more closely related to birds, reptiles, or something else?	1
When sharks lose teeth, are they pushed out by newer ones, or do they fall out and are replaced months later?	1