/r/askscience

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Why is geostationary orbit for a satellite fixed at about 36,000 km above the Earth? What makes this the optimum distance?

1885 upvotes • yeah_no_

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If aging is caused by random mutations, then why do humans all follow pretty much the same aging trajectory?

1885 upvotes • jonnysteezz

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Is it theoretically possible to come up with a code that is impossible to crack?

1884 upvotes • SCUMDOG_MILLIONAIRE

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A gas becomes a plasma when there is so much energy that the electrons break away. Does this mean that plasmas cannot react chemically with other substances?

1883 upvotes • mrmahoganyjimbles

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Does the metal in the solid core of a rocky planet have any special properties?

1883 upvotes • VillagerNo4

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What makes the electron shells of the atoms between Scandium and Zinc seem to go haywire, while suddenly regaining a stable outer shell increase from Gallium to Krypton? Why does this pattern repeat throughout the periods?

1882 upvotes • InfinityIsAnIllusion

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When we step on the ground, does the pressure kill any microscopic organisms?

1881 upvotes • Infinitax

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Astronomers of Reddit: It seems all cool "large-scale" events take either billions of years to develop or just a few moments to occur. Are there any fun "large" events (galactic?) that occur over more observable timelines (e.g. days, weeks, or months?)

1879 upvotes • SubmergedSublime

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Why do scientists always pour some liquid on the strip before examining something under a microscope?

1879 upvotes • InspectorMadShit

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What happens in the brain when someone is knocked unconscious?

1876 upvotes • fishboy2000

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why is geostationary orbit for a satellite fixed at about 36,000 km above the Earth? What makes this the optimum distance?	1885	yeah_no_
If aging is caused by random mutations, then why do humans all follow pretty much the same aging trajectory?	1885	jonnysteezz
Is it theoretically possible to come up with a code that is impossible to crack?	1884	SCUMDOG_MILLIONAIRE
A gas becomes a plasma when there is so much energy that the electrons break away. Does this mean that plasmas cannot react chemically with other substances?	1883	mrmahoganyjimbles
Does the metal in the solid core of a rocky planet have any special properties?	1883	VillagerNo4
What makes the electron shells of the atoms between Scandium and Zinc seem to go haywire, while suddenly regaining a stable outer shell increase from Gallium to Krypton? Why does this pattern repeat throughout the periods?	1882	InfinityIsAnIllusion
When we step on the ground, does the pressure kill any microscopic organisms?	1881	Infinitax
Astronomers of Reddit: It seems all cool "large-scale" events take either billions of years to develop or just a few moments to occur. Are there any fun "large" events (galactic?) that occur over more observable timelines (e.g. days, weeks, or months?)	1879	SubmergedSublime
Why do scientists always pour some liquid on the strip before examining something under a microscope?	1879	InspectorMadShit
What happens in the brain when someone is knocked unconscious?	1876	fishboy2000