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

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What happens to the mitochondria as an animal ages? Are their fewer per cell? Are mitochondria less efficient?

8 upvotes

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If the Solar System were located near the center of the Milky Way, would the density of stars there be high enough to cause Earth's night to be somewhat day-like?

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Do any eukaryotic organisms have both mitochondrial and vestigial prokaryotic respiration mechanisms?

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Which fully differentiated cells in an adult human are the least differentiated, i.e., are most like an undifferentiated stem cell?

6 upvotes

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Do fossils contain material belonging to the original animal or plant?

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If the center of our galaxy was not occluded by interstellar gas, how big and bright would it be compared to, say, a full moon?

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What is the smallest animal capable of powered flight (not gliding)?

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Did the Earth have ice ages in it's distant past before life developed? How could we know?

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Nature likes to reuse architecture. Within the cerebrum, are there any known analogs of notochordal segmentation? Do ganglia and other smart clumps develop through processes similar to primitive CNS segmentation?

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Can fMRI show synesthesia? If so, do any animals other than man appear to have synesthetic faculties?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What happens to the mitochondria as an animal ages? Are their fewer per cell? Are mitochondria less efficient?	8
If the Solar System were located near the center of the Milky Way, would the density of stars there be high enough to cause Earth's night to be somewhat day-like?	8
Do any eukaryotic organisms have both mitochondrial and vestigial prokaryotic respiration mechanisms?	7
Which fully differentiated cells in an adult human are the least differentiated, i.e., are most like an undifferentiated stem cell?	6
Do fossils contain material belonging to the original animal or plant?	5
If the center of our galaxy was not occluded by interstellar gas, how big and bright would it be compared to, say, a full moon?	5
What is the smallest animal capable of powered flight (not gliding)?	5
Did the Earth have ice ages in it's distant past before life developed? How could we know?	5
Nature likes to reuse architecture. Within the cerebrum, are there any known analogs of notochordal segmentation? Do ganglia and other smart clumps develop through processes similar to primitive CNS segmentation?	3
Can fMRI show synesthesia? If so, do any animals other than man appear to have synesthetic faculties?	3