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

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If modern man came into existence 200k years ago, but modern day societies began about 10k years ago with the discoveries of agriculture and livestock, what the hell where they doing the other 190k years??

3227 upvotes

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Do airline crews suffer a higher ratio of radiation illnesses?

58 upvotes

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Does the moon pull on Earth a bit so that both celestial bodies whip/wobble around each other, or is the Earth massive enough that it's largely stationary and the moon just runs around it?

8 upvotes

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How many trees does it take to cover CO2 emissions of a car?

6 upvotes

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Has the Earth's magnetic field ever disappeared and if so, how do scientists know this?

5 upvotes

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How long until the truck driving industry is replaced with self-driving trucks?

5 upvotes

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Can you train the tiny muscles around your capillaries, arteries, and veins by alternating between cold and hot showers?

2 upvotes

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Does sunscreen actually cause damage to coral reefs?

2 upvotes

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What is currently considered the most effective or possibly beneficial nootropic?

1 upvotes

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What's the consistency of matter in a blackhole?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If modern man came into existence 200k years ago, but modern day societies began about 10k years ago with the discoveries of agriculture and livestock, what the hell where they doing the other 190k years??	3227
Do airline crews suffer a higher ratio of radiation illnesses?	58
Does the moon pull on Earth a bit so that both celestial bodies whip/wobble around each other, or is the Earth massive enough that it's largely stationary and the moon just runs around it?	8
How many trees does it take to cover CO2 emissions of a car?	6
Has the Earth's magnetic field ever disappeared and if so, how do scientists know this?	5
How long until the truck driving industry is replaced with self-driving trucks?	5
Can you train the tiny muscles around your capillaries, arteries, and veins by alternating between cold and hot showers?	2
Does sunscreen actually cause damage to coral reefs?	2
What is currently considered the most effective or possibly beneficial nootropic?	1
What's the consistency of matter in a blackhole?	1