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

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Are there four limbs on most non-insect Animalia (fins, flippers, arms/legs) because we all trace back to a common ancestor, or because it is most efficient on this planet? Or something else?

4 upvotes

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If you are infected by covid19, but don't know it, will you test positive weeks later?

1 upvotes

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Does light from a lightbulb travel at the same speed as light from a star?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Are there four limbs on most non-insect Animalia (fins, flippers, arms/legs) because we all trace back to a common ancestor, or because it is most efficient on this planet? Or something else?	4
If you are infected by covid19, but don't know it, will you test positive weeks later?	1
Does light from a lightbulb travel at the same speed as light from a star?	1