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

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Only show posts with narrations

I’m watching a Spark show on Neanderthals that says most humans have 2-4% Neanderthal DNA, except Africans. Because Neanderthals roamed far and wide, except not to Africa. But didn’t they come from Africa? Didn’t all Homos evolve in Africa?

1764 upvotes

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Since CO_2_ in our blood regulates our autonomic breathing reflex, what effect has increased atmospheric CO_2_ had on humans and our breathing (and other animals, if possible)?

48 upvotes

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Why is this me H1N1 strain in this year’s flu vaccine different between the egg grown vaccine and the cell-grown vaccine?

5 upvotes

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How do scientists know so quickly whether a tsunami will happen or not after an earthquake?

2 upvotes

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How long before no one can climb Everest without supplements oxygen?

1 upvotes

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How do zoo keepers manage animal reproduction?

1 upvotes

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If the human body is alkaline (average blood pH 7.4 or so) why are so many of the things we eat and drink acidic?

1 upvotes

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How does a mutation in mitochondrial DNA cause disease in people?

1 upvotes

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Why do plants make drugs?

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Today Nigeria announced that it was polio-free. If polio were eliminated through vaccination, could we ever stop vaccinating?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
I’m watching a Spark show on Neanderthals that says most humans have 2-4% Neanderthal DNA, except Africans. Because Neanderthals roamed far and wide, except not to Africa. But didn’t they come from Africa? Didn’t all Homos evolve in Africa?	1764
Since CO_2_ in our blood regulates our autonomic breathing reflex, what effect has increased atmospheric CO_2_ had on humans and our breathing (and other animals, if possible)?	48
Why is this me H1N1 strain in this year’s flu vaccine different between the egg grown vaccine and the cell-grown vaccine?	5
How do scientists know so quickly whether a tsunami will happen or not after an earthquake?	2
How long before no one can climb Everest without supplements oxygen?	1
How do zoo keepers manage animal reproduction?	1
If the human body is alkaline (average blood pH 7.4 or so) why are so many of the things we eat and drink acidic?	1
How does a mutation in mitochondrial DNA cause disease in people?	1
Why do plants make drugs?	1
Today Nigeria announced that it was polio-free. If polio were eliminated through vaccination, could we ever stop vaccinating?	1