/u/Piranha_Plant05's posts in /r/askscience

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Why do some radioisotopes decay and give off alpha particles and some give off beta particles?

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If we get goosebumps to straighten hairs to make ourselves appear bigger when frightened, why do we get them when cold, or when thinking about something nostalgic? I can pretty much get them on command thinking about certain good memories or listening to Sweden or some old pokémon songs.

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In terms of evolution, why do wounds itch?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do some radioisotopes decay and give off alpha particles and some give off beta particles?	1
If we get goosebumps to straighten hairs to make ourselves appear bigger when frightened, why do we get them when cold, or when thinking about something nostalgic? I can pretty much get them on command thinking about certain good memories or listening to Sweden or some old pokémon songs.	1
In terms of evolution, why do wounds itch?	1