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

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Do animals that dream know when they're dreaming?

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Why don't people die from CO2 inhalation when smoking a cigarette, joint, etc.?

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How long ago did the typical organ layout (heart, lungs, stomach, intestines, etc.) evolve?

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When you receive a dose of radiation lethal enough to kill you in seconds (or sooner), what kills you? What happens in your body?

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What would happen if I ingested a whole gram of pure LSD? Would I die? If so, from what? If not, what would happen? Do we know?

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Why do photons, which have zero rest mass, get affected by gravity? Gravity is just matter curving spacetime and in turn enacting a force on other matter, so how does gravity enact a force on things with no matter?

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There are seemingly plenty of ways to turn matter into energy, but are there any ways to turn energy into matter?

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How long do body cells live after death? Which die first, and which die last?

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Quantum tunneling on the macroscopic (everyday object, ~1-100 kg or so) scale is mentioned theoretically all the time, but specifics are rarely given. Is there a way to calculate accurately the actual probability of a given object abruptly quantum tunneling?

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How the hell does the Oberth effect work?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Do animals that dream know when they're dreaming?	1
Why don't people die from CO2 inhalation when smoking a cigarette, joint, etc.?	1
How long ago did the typical organ layout (heart, lungs, stomach, intestines, etc.) evolve?	1
When you receive a dose of radiation lethal enough to kill you in seconds (or sooner), what kills you? What happens in your body?	1
What would happen if I ingested a whole gram of pure LSD? Would I die? If so, from what? If not, what would happen? Do we know?	1
Why do photons, which have zero rest mass, get affected by gravity? Gravity is just matter curving spacetime and in turn enacting a force on other matter, so how does gravity enact a force on things with no matter?	1
There are seemingly plenty of ways to turn matter into energy, but are there any ways to turn energy into matter?	1
How long do body cells live after death? Which die first, and which die last?	1
Quantum tunneling on the macroscopic (everyday object, ~1-100 kg or so) scale is mentioned theoretically all the time, but specifics are rarely given. Is there a way to calculate accurately the actual probability of a given object abruptly quantum tunneling?	1
How the hell does the Oberth effect work?	1