/r/askscience

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When a baby is in the womb, what is the biological signal that lets the mother know the baby has reached full development, and what goes wrong with this signal when a child is born premature or late?

5443 upvotes • Mvnz

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Where do hamsters live in the wild?

5440 upvotes • SloanKettering1290

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How do they keep patients alive during heart surgery when they switch out the the heart for the new one?

5439 upvotes • FatAndAnnoying

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If two identical twins produced an offspring (gross), would the offspring be some kind of genetic clone?

5434 upvotes • adirondank

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How is meth different from ADHD meds?

5428 upvotes • Psychocrates

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Is the universe 13.8 billion years old everywhere?

5428 upvotes • FarginSneakyBastage

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New Horizons flies by Pluto in 33 Minutes! - NASA Live Stream

5419 upvotes • AskScienceModerator

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Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth?

5417 upvotes • TheDesertSnowman

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I’ve been perusing Wikipedia pages on hurricanes after Michael and have found detailed accounts of hurricane development for storms back in the late 1800s. How were these accounts recorded and/or constructed?

5416 upvotes • Vollaran

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When people forge metal and parts flake off, what's actually happening to the metal?

5414 upvotes • Serendiplodocus

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
When a baby is in the womb, what is the biological signal that lets the mother know the baby has reached full development, and what goes wrong with this signal when a child is born premature or late?	5443	Mvnz
Where do hamsters live in the wild?	5440	SloanKettering1290
How do they keep patients alive during heart surgery when they switch out the the heart for the new one?	5439	FatAndAnnoying
If two identical twins produced an offspring (gross), would the offspring be some kind of genetic clone?	5434	adirondank
How is meth different from ADHD meds?	5428	Psychocrates
Is the universe 13.8 billion years old everywhere?	5428	FarginSneakyBastage
New Horizons flies by Pluto in 33 Minutes! - NASA Live Stream	5419	AskScienceModerator
Are there any other animals known to "work out", or do an activity for the sole purpose of muscle growth?	5417	TheDesertSnowman
I’ve been perusing Wikipedia pages on hurricanes after Michael and have found detailed accounts of hurricane development for storms back in the late 1800s. How were these accounts recorded and/or constructed?	5416	Vollaran
When people forge metal and parts flake off, what's actually happening to the metal?	5414	Serendiplodocus