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

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Are there any examples of species that have gone extinct and then much later come back into existence via a totally different evolutionary route?

832 upvotes

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When astronomers say that "space is expanding," does that just mean that the things in space are moving away (say, from 3 to 7 cm on a ruler), or does it mean the unit length itself is being distorted (it's still 3 cm, but centimeters themselves are now longer)?

453 upvotes

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Why didn't whole households die of consumption?

13 upvotes

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What effect has climate change already had on terrestrial wildlife?

1 upvotes

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Are there any scientifically proven ways to promote neuroplasticity in adults?

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Are there any scientifically proven ways to promote or effect neuroplasticity in adults?

1 upvotes

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Do less impactful stressors than death cause evolutionary adaptations?

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Is death the only thing that drives evolution?

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Why can’t humans sleep at will?

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If humanity were suddenly transported back to the pre-industrial era, say, 1500—no electricity, machines, etc.— but we still had all of our knowledge from today, how long would it take to build a smartphone? Could we do it within a generation? 10 years?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Are there any examples of species that have gone extinct and then much later come back into existence via a totally different evolutionary route?	832
When astronomers say that "space is expanding," does that just mean that the things in space are moving away (say, from 3 to 7 cm on a ruler), or does it mean the unit length itself is being distorted (it's still 3 cm, but centimeters themselves are now longer)?	453
Why didn't whole households die of consumption?	13
What effect has climate change already had on terrestrial wildlife?	1
Are there any scientifically proven ways to promote neuroplasticity in adults?	1
Are there any scientifically proven ways to promote or effect neuroplasticity in adults?	1
Do less impactful stressors than death cause evolutionary adaptations?	1
Is death the only thing that drives evolution?	1
Why can’t humans sleep at will?	1
If humanity were suddenly transported back to the pre-industrial era, say, 1500—no electricity, machines, etc.— but we still had all of our knowledge from today, how long would it take to build a smartphone? Could we do it within a generation? 10 years?	1