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

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Has the evolution of mammals and of the human race been a steady progression of increasing body size, or were there periods when our ancestral lineage underwent significant decreases in body size?

59 upvotes

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Do all people of the world have similar bacteria on their bodies and in their homes, or are there distinct breeds of bacteria for every continent?

6 upvotes

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If CO2 levels could be controlled easily, what would be the ideal level?

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Can a vertebrate embryo be grown with radial symmetry?

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Do male animals avoid breeding with diseased, disfigured and genetically unfit females?

1 upvotes

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Does the olfactory system prime responses in the immune system to potential pathogens in the environment?

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Is it possible that black holes do not exist?

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What species of mammal dies of starvation in the wild most frequently relative to death by other causes?

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Would polar ice caps on an ocean planet drift away from the poles without landmasses holding them in place?

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How do animals respond to injury?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Has the evolution of mammals and of the human race been a steady progression of increasing body size, or were there periods when our ancestral lineage underwent significant decreases in body size?	59
Do all people of the world have similar bacteria on their bodies and in their homes, or are there distinct breeds of bacteria for every continent?	6
If CO2 levels could be controlled easily, what would be the ideal level?	1
Can a vertebrate embryo be grown with radial symmetry?	1
Do male animals avoid breeding with diseased, disfigured and genetically unfit females?	1
Does the olfactory system prime responses in the immune system to potential pathogens in the environment?	1
Is it possible that black holes do not exist?	1
What species of mammal dies of starvation in the wild most frequently relative to death by other causes?	1
Would polar ice caps on an ocean planet drift away from the poles without landmasses holding them in place?	1
How do animals respond to injury?	0