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

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Are we as humans planting enough trees to meet our wood/paper needs while ensuring enough oxygen generation?

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Why do we use the term "came from a sperm" and never "came from an egg"?

1 upvotes

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Are there any naturally occurring negative numbers outside of temperature?

1 upvotes

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Why did males evolve with testicles outside of the body? As a general weak point, and necessary for reproduction, wouldn’t they be safer contained inside the body?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Are we as humans planting enough trees to meet our wood/paper needs while ensuring enough oxygen generation?	2
Why do we use the term "came from a sperm" and never "came from an egg"?	1
Are there any naturally occurring negative numbers outside of temperature?	1
Why did males evolve with testicles outside of the body? As a general weak point, and necessary for reproduction, wouldn’t they be safer contained inside the body?	1