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

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Why do longer screws have a blank section near the head instead of threads going all the way up?

1305 upvotes

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Are Redshift/Blueshift used to determine which way a star is traveling? How can we know when one is happening instead of the other?

9 upvotes

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Why is it better (easier?) to land a rover on Mars to observe it closely than to "just" zoom in way close?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do longer screws have a blank section near the head instead of threads going all the way up?	1305
Are Redshift/Blueshift used to determine which way a star is traveling? How can we know when one is happening instead of the other?	9
Why is it better (easier?) to land a rover on Mars to observe it closely than to "just" zoom in way close?	1