/u/[deleted]'s posts in /r/askscience

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If PCR tests look for specific DNA sequences, how can they be false positives?

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Why is it, that the smaller of a particle we want to detect, the larger of a detector we must build?

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If I shot a bullet facing backwards on a moving vehicle with speed equal to the bullet's, will the bullet just fall down to the ground?

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I am outside the International Space Station doing whatever it is that they do, and I turn around so I'm facing Earth and push off of the ISS (like in a swimming pool) as hard as I can. Will I eventually reenter the Earth's atmosphere and plummet to my death?

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Ok, we have a hypothetical impossibly long stick. 1 light year long, for simplicity's sake. I'm impossibly strong (or we're gravity free), and move the stick up an inch from one end, when does the other end move?

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Does the Moon create 'tides' in the orbits of geosynchronous satellites?

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Uncertainty principle - why is the ability to measure the location and movement simultaneously a violation of the laws of physics instead of insufficiently advanced measuring tools?

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How can any tumor be benign? Isn't all cancer an uncontrolled growth of cells? Why doesn't that fit the definition of all tumors?

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Can microwaves harm you if you stand close to them while they are cooking food?

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How do scientists decipher a language with no known speakers?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If PCR tests look for specific DNA sequences, how can they be false positives?	36
Why is it, that the smaller of a particle we want to detect, the larger of a detector we must build?	36
If I shot a bullet facing backwards on a moving vehicle with speed equal to the bullet's, will the bullet just fall down to the ground?	36
I am outside the International Space Station doing whatever it is that they do, and I turn around so I'm facing Earth and push off of the ISS (like in a swimming pool) as hard as I can. Will I eventually reenter the Earth's atmosphere and plummet to my death?	36
Ok, we have a hypothetical impossibly long stick. 1 light year long, for simplicity's sake. I'm impossibly strong (or we're gravity free), and move the stick up an inch from one end, when does the other end move?	36
Does the Moon create 'tides' in the orbits of geosynchronous satellites?	36
Uncertainty principle - why is the ability to measure the location and movement simultaneously a violation of the laws of physics instead of insufficiently advanced measuring tools?	36
How can any tumor be benign? Isn't all cancer an uncontrolled growth of cells? Why doesn't that fit the definition of all tumors?	36
Can microwaves harm you if you stand close to them while they are cooking food?	36
How do scientists decipher a language with no known speakers?	36