The biology tag has no wiki summary.
3
votes
2answers
337 views
Human perception of distance
When we see things around us, distant objects look smaller to our eyes than nearby objects do.
Is there any physics-related reason why our eyes or brain perceive things like this?
Or if this is ...
5
votes
1answer
271 views
Would travelling at relativistic speeds have any impact on human biology?
If a person was sitting on a craft that has accelerated to near light speed speed from Earth (e.g. 99.999% of light speed) would there be any impact on his or her human biology due to relativistic ...
21
votes
2answers
2k views
Why is the sky not purple?
I realise the question of why this sky is blue is considered reasonably often here, one way or another. You can take that knowledge as given. What I'm wondering is, given that the spectrum of ...
2
votes
4answers
2k views
What could make the SWITL materials behave like this?
SWITL - what could this be? Ultra thin paper with some adhesive that binds to fat? (or as I originally thought, a hoax)?
A robotic hand to scoop gel-like substances...
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5
votes
2answers
176 views
Effects of a very large magnetic field on the human body
Ever since reading about the NHMFL I have always wondered about this and asked several people without getting a good satisfactory answer. My question is, considering the simplest case let's say a ...
5
votes
1answer
1k views
How much sky do we see at any one moment?
When we look at any particular point the sky, what percentage of the celestial sphere do we see?
This question arises from the notion that on average there passes one meteor per hour overhead. So ...
2
votes
1answer
506 views
Effects of high frequency lighting on human vision?
I have a couple of different LED flashlights. One of them has three different "modes" of brightness, and the way it controls it is via pulse width modulation (PWM). Here is a picture that illustrates ...
