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

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Are there any animals that are known/expected to exist based on remains and other evidence, but that we don't have any sightings of?

1165 upvotes

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Is it possible to bring a fetus from fertilization to birth completely within a lab environment (no implantation)?

471 upvotes

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Why is it that all macroscopic organisms (that I know of, anyway) are left-right symmetric?

30 upvotes

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Does keeping someone conscious after a severe injury actually increase their chance of survival?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Are there any animals that are known/expected to exist based on remains and other evidence, but that we don't have any sightings of?	1165
Is it possible to bring a fetus from fertilization to birth completely within a lab environment (no implantation)?	471
Why is it that all macroscopic organisms (that I know of, anyway) are left-right symmetric?	30
Does keeping someone conscious after a severe injury actually increase their chance of survival?	1