In the deep, far future, at the time of the "heat death" of the universe, if I turn on a radio will I get the sound of static or of total silence?
Regarding sleep quality, why did humans evolve to require full darkness?
I know evolution is governed by chance and it is random but does it make sense to "ruin" sleep if there's light? I mean normally, outside, you never have pure darkness, there are the moon and stars even at night. In certain zones of the Earth we also have long periods of no sunshine and long periods of only sunshine....
Why are honeybee stingers barbed?
There are many other bee species that can sting Humans and survive, but the European honeybee has a barbed stinger, so it cannot remove the stinger once it's stung. In attempting to remove the stinger the bee will rupture its lower abdomen and then die....
How dense would the atmosphere need to be to result in a cataclysmic chain reaction during a nuclear explosion?
Famously, Oppenheimer and co worked out how close a nuclear bomb test would be to causing a chain reaction of nitrogen fusion in the atmosphere. They made a lot of worst-case-scenario assumptions and still came to the conclusion that no, a nuclear bomb test wouldn’t scour the surface of the world....
Do we know how long it took for cuneiform to develop from counting cows and barley, to drafting official documents and contracts, to creating literature?
Is there a temperature so hot that relativistic effects are noticeable?
[Physics] Does gravity have 'elasticity'? If a solid sun-sized object zooms across space at the speed of light, then abruptly stops, does it take gravity some time to 'settle' around it?
Is it a stable/static effect no matter what, or is it a bit more stretchy/bouncy depending on how the object is behaving?...
If life never emerged on Earth, would the continents still be more or less the same today? In other words, does life affect the formation and movement of continents significantly?
Are there other human traits like light skin which people developed to adapt to the "new" environment they settled in?
I'm referring to the human race evolving in the African continent and then migrating to the rest of the world....
How does the impact of disposed rubber on the environment compare to plastics?
I assume it would break into smaller particles similar to the formation of microplastics. I hear about the effects of microplastics all the time. Are the effects of disposed rubber on the environment studied as extensively?
Is the heat produced by fossil and nuclear fuel negligible?
We often talk about the climate impact based on greenhouse gases, but extracting fuel from the ground and using it in exothermal processes of course also releases energy as heat....
Where is all the water going from climate change?
Now that late spring/early summer is upon us, there's increasingly more headlines about less rain in various places (recent floods notwithstanding). I'm assuming that's because water is evaporating and not returning to those places, but where is it going?...
Can you get a sunburn from light reflected by a window pane?
Say I am sitting in the shadow, but the sunlight gets reflected by some window pane onto me. Does this contain enough UV light to give me a sunburn?
Beyond the established symmetries of physics - Charge, Spin, Color, Time, etc. - is there any such thing as symmetry of Information?
tRNA suppressor mutation to transcribe nonsense mutations
Okay, so I know this might be a bit hyperspecific, but I don't know where else to ask it. I'm working through a microbiology lecture, and the professor says the the B strain of E. coli has a tRNA suppressor that allows it to transcribe phage genes that have any nonsense mutation. That seemed a bit vague, so I decided to look it...
Does sociology extend to other social animals besides humans?
If sociology's exclusive to humans, then what might be the field of other social animal research?
Does having fur help or hinder animals like otters/beavers/polar bears when they swim about?
Spring Potential Energy
Say a dissolvable spring is compressed with a bolt and nut that do not melt in a sulfuric acid solution. The spring has quite a bit of potential energy at this point since it is compressed. Assuming the spring dissolves perfectly (no breakage, just complete disintegration), what happens to the potential energy of the spring?
Do we have any estimates as to how long it takes for a species of bacteria to go technically extinct entirely via genetic drift?
So, let’s say there’s a species of bacteria that is known to dwell in Greek yogurt. How long would it take before that species of yogurt-dweller only has modern descendants different enough to qualify as one or more new species?
is this the starting point of a new cosmology ?
Hi,...
Certified online course for learning STEM subjects?
I'm thinking of switching fields within STEM and there are some mathsy modules which I missed out on during my undergrad (biology) that would come in really handy right now....
What can I use to harden acrylic paints or resin?
Asking because while I see that paint hardeners exist in the USA, there doesn't seem to be anything similar in my country (Brazil)...
Would celite/carbon vacuum filtration perform well enough to remove photopolymers from isopropyl alcohol?
I am simply on a quest to find an effective non-distillation method for purifying isopropyl alcohol used for rinsing resin 3D prints....