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?
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....
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....
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...
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?
is this the starting point of a new cosmology ?
Hi,...
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....