Score
Title
266
AskScience Panel of Scientists XVIII
634
AskScience AMA Series: IAmA restoration ecologist focused on restoring oysters to the NY Harbor in New York City. AMA!
9367
How does a master key work?
60
How is it so that several (all?) mammals grow and lose a set of "baby teeth" before growing their final dentition? Why stop at two sets when other vertebrates such as sharks regenerate their teeth constantly?
22
How do our eyes avoid being commonly infected through things like rubbing our eyes or the pollutants in the air?
22
If placed in a controlled environment, do trees that normally undergo seasonal leaf Abcission stop losing their leaves?
5522
How does sunscreen stop you from getting burnt?
6
Are women born with all their eggs?
16
Do nocturnal animals prefer sleeping conditions that are dimly lit or bright in contrast to humans which prefer dark conditions?
9
[Medicine] What leads a body to reject or accept donated organs?
33
If the human body has evolved over millions of years to swell up in response to an injury, why are we instructed to apply ice to prevent our evolutionary swelling response?
12
How do phones keep cool with small heatsinks and no fans?
7
How can we tell if someone we can’t see is shouting from far away or whispering close to us?
7
Why are shadows casted from objects more crisp depending on how far the object is from the ground?
12
How does a train engine, pulling miles of cars and many tons of load, get enough traction to actually move everything?
3
Would objects orbiting Earth, such as space debris, satellites, the ISS, be hot or cold to the touch?
18
Studies have shown that small movements in the throat occur during an internal dialogue--does that happen when music plays in your head, too?
5
What is causing this orbiting water droplet in my tea kettle?
2
How is hybrid fruit produced?
5
Why is cold weather usually synonymous with pneumonia infections?
6
Are there more cases of depression in modern times than in history?
65
Why does sunburnt skin feel hot to the touch?
10
Air molecules travel at 1000 mph. Can we harness that kinetic energy?
0
Are there any videos from NASA or other space agency where they do tests in the vacuum of space? Such as a plant or mice or anything is taken outside of the space shuttle/station
27
When you shake up a carbonated drink, where does the pressure go once it’s ‘settled’?
1
How is the mute/play next functionality on audio-jack earbuds implemented?
1
How does atmospheric scintillation work in detail?
10
In my chemistry class yesterday we learned about the pathlength of gas molecules in a gas at STP. What is the pathlength of interstellar hydrogen? What about the intergalactic medium?
6
Why is space and space travel illustrated, for the most part, on a horizontal line? Can't we space travel "upwards" or "downwards" and where would that eventually lead?
1
Can the exact solution of a system of non-linear equations be determined algebraically?
8
Is there any scientific evidence that dinosaurs roared (as seen in movies)?
3
Why don't we normally hear sounds when we move our heads?
0
Can rare astronomical phenomena such as solar eclipses or supernovas disrupt biological cycles of living organisms?
1
Angles allow you translate between X, Y and Z - is there an equivalent between time and the spatial dimensions?
15
How were the subduction zones discovered and observed?
22
What factors affect the orbit of our sun around the galaxy?
2
Which potassium compounds are present in lye water? If it's not KOH then how is it made from the ash?
6
Do mental illnesses run in families? Will they be the same mental illness or can they vary between each offspring?
5
Does the genetic composition of a woman's eggs change over her lifespan?
21
Why do images on a monitor become negtive when viewed from a certain angle?
14
How far in advance can we predict a major tectonic event?
2888
How are drugs like antidepressants (who’s effects aren’t immediately apparent) developed?
3903 aslan_chan Well the short answer from the quoted paper where that measurement came from "The channel is more like a high-gradient mountain stream with a very large discharge; which is consistent with the theory that a short mountain river eroded through the divide and reached Malebo Pool, forming the present Lower Congo River. " This is the location where that measurement came from. However reading the rest of it, this is an anomalous depth and the majority of the river co forms to more normal standards and is around 10 to 80m on average.
566 exohugh Both [the height profile](https://i.imgur.com/GJWZEKs.png) and the sheer volume of water (42,000 cubic metres per second) give the river an insane amount of erosion power, carving a far deeper channel than, for example, the Amazon which has an [extremely shallow profile](https://media1.britannica.com/eb-media/55/103655-004-81742AE5.gif) over its lower course. (EDIT: In fact the amazon takes around 5000km to drop from 200 meters altitude to sea-level. The Congo does the same in just its final 100km.) The first European to explore [the Livingstone falls](https://en.wikipedia.org/wiki/Livingstone_Falls) (the long, steep stretch above Matadi), Henry Morton Stanley, said of them: *"..the wildest stretch of river that I have ever seen. Take a strip of sea blown over by a hurricane, four miles in length and half a mile in breadth, and a pretty accurate conception of its leaping waves may be obtained. Some of the troughs were 100 yards in length, and from one to the other the mad river plunged. There was first a rush down into the bottom of an immense trough, and then, by its sheer force, the enormous volume would lift itself upward steeply until, gathering itself into a ridge, it suddenly hurled itself 20 or 30 feet straight upward, before rolling down into another trough. If I looked up or down along this angry scene, every interval of 50 or 100 yards of it was marked by wave-towers - their collapse into foam and spray, the mad clash of watery hills, bounding mounds and heaving billows, while the base of either bank, consisting of a long line of piled boulders of massive size, was buried in the tempestuous surf. The roar was tremendous and deafening. I can only compare it to the thunder of an express train through a rock tunnel."*
164 [deleted] [removed]
3905 0 aslan_chan Well the short answer from the quoted paper where that measurement came from "The channel is more like a high-gradient mountain stream with a very large discharge; which is consistent with the theory that a short mountain river eroded through the divide and reached Malebo Pool, forming the present Lower Congo River. " This is the location where that measurement came from. However reading the rest of it, this is an anomalous depth and the majority of the river co forms to more normal standards and is around 10 to 80m on average.
563 0 exohugh Both [the height profile](https://i.imgur.com/GJWZEKs.png) and the sheer volume of water (42,000 cubic metres per second) give the river an insane amount of erosion power, carving a far deeper channel than, for example, the Amazon which has an [extremely shallow profile](https://media1.britannica.com/eb-media/55/103655-004-81742AE5.gif) over its lower course. (EDIT: In fact the amazon takes around 5000km to drop from 200 meters altitude to sea-level. The Congo does the same in just its final 100km.) The first European to explore [the Livingstone falls](https://en.wikipedia.org/wiki/Livingstone_Falls) (the long, steep stretch above Matadi), Henry Morton Stanley, said of them: *"..the wildest stretch of river that I have ever seen. Take a strip of sea blown over by a hurricane, four miles in length and half a mile in breadth, and a pretty accurate conception of its leaping waves may be obtained. Some of the troughs were 100 yards in length, and from one to the other the mad river plunged. There was first a rush down into the bottom of an immense trough, and then, by its sheer force, the enormous volume would lift itself upward steeply until, gathering itself into a ridge, it suddenly hurled itself 20 or 30 feet straight upward, before rolling down into another trough. If I looked up or down along this angry scene, every interval of 50 or 100 yards of it was marked by wave-towers - their collapse into foam and spray, the mad clash of watery hills, bounding mounds and heaving billows, while the base of either bank, consisting of a long line of piled boulders of massive size, was buried in the tempestuous surf. The roar was tremendous and deafening. I can only compare it to the thunder of an express train through a rock tunnel."*
164 0 [deleted] [removed]