What is the earliest event there is evidence of cultural memory for? |
- What is the earliest event there is evidence of cultural memory for?
- I've seen dogs walk in a circle before they sit and heard this is a remnant from flattening grass in the wild. What are some things we do as humans that we might not realise are driven by an ancestral purpose?
- What are sparks fundamentally made out of?
- Why does the pitch of sirens lower when they pass by?
- Do animals trade stuff?
- When we have fever, how does the body increase its temperature? Also why does it let the fever reach dangerously high in some cases?
- What is the difference between heat (q) and temperature (T)?
- Why does healthy human eye have no chromatic aberration?
- What are the roles of introns within pre-mRNA strands if they just get removed? (And as a side note, how **do** they get removed?)
- How do Non-Newtonian fluids freeze?
- Why is the mass of an Electron and Positron not identical?
- Our moon rotates to match earths orbit, hence we always see the same side of the moon. My question, are there any other moons in our system that exhibit the same behavior?
- Besides the earth's magnetic field, what's the strongest non-electromagnetic magnet?
- What exactly makes the difference between genetic variation and a new species?
- Why Do Low Frequency Sound Waves Diffract More than High Frequency Ones?
- How did long distance migration develop in birds?
- Is there actually a correlation between high intelligence / IQ and poor social skills?
- [Physics] How does Sonoluminescence work?
- What's the role of topoisomerases and gyrases in DNA replication and how do they do what they do?
- Why don't same touching metal surfaces fuse to each other?
| What is the earliest event there is evidence of cultural memory for? Posted: 09 Sep 2016 10:31 PM PDT I'm talking about events that happened before recorded history, but that were passed down in oral history and legend in some form, and can be reasonably correlated. The existence of animals like mammoths and sabre-toothed tigers that co-existed with humans wouldn't qualify, but the "Great Mammoth Plague of 14329 BCE" would. [link] [comments]  |
| Posted: 10 Sep 2016 12:11 AM PDT |
| What are sparks fundamentally made out of? Posted: 09 Sep 2016 08:19 PM PDT For example, when you connect jumpers to a car battery and touch the two charged ends together so that sparks jump off, what are they made of and how are they created? [link] [comments]  |
| Why does the pitch of sirens lower when they pass by? Posted: 10 Sep 2016 02:59 AM PDT Like when a police car/ambulance/firetruck drives by sirens blaring, the pitch of the siren seems to lower after they pass by and drive away. It also seems to only happen in Europe, to my experience. Is it due to displacement or something of that sort? [link] [comments]  |
| Posted: 10 Sep 2016 03:46 AM PDT It's in the title, really. Do animals sometimes propose a trade and choose to exchange (or not exchange) something? [link] [comments]  |
| Posted: 09 Sep 2016 07:53 PM PDT |
| What is the difference between heat (q) and temperature (T)? Posted: 09 Sep 2016 11:17 PM PDT |
| Why does healthy human eye have no chromatic aberration? Posted: 10 Sep 2016 12:04 AM PDT Telescope manufacturers charge fortunes for telescopes with good color correction. They use two and three lens combinations to fight chromatic aberration, which is well explained by physics. But how does an eye, with just one lens in it have no aberration? Is it the processing in the brain that eliminates it? Have anyone tried to capture what's in the "focal surface" of the eye with a CCD sensor or something? [link] [comments]  |
| Posted: 09 Sep 2016 08:47 PM PDT |
| How do Non-Newtonian fluids freeze? Posted: 09 Sep 2016 08:56 AM PDT |
| Why is the mass of an Electron and Positron not identical? Posted: 09 Sep 2016 09:04 AM PDT Upon looking at the masses of both the electron and positron, I was confused to discover that they were not identical in mass. Albeit the difference is so small (6.471x10-38) that it is negligable, but it still surprised me as I was under the assumption that a particle and its antiparticle had the same mass. Is this not the case? If so, why? [link] [comments]  |
| Posted: 09 Sep 2016 06:34 PM PDT |
| Besides the earth's magnetic field, what's the strongest non-electromagnetic magnet? Posted: 09 Sep 2016 03:56 PM PDT |
| What exactly makes the difference between genetic variation and a new species? Posted: 09 Sep 2016 03:42 PM PDT What exactly marks a new species? I know the difference is that a single species is defined as being able to produce fertile offspring, but what exactly makes that difference? [link] [comments]  |
| Why Do Low Frequency Sound Waves Diffract More than High Frequency Ones? Posted: 09 Sep 2016 09:03 AM PDT I am reading a book about sound and it states the following: "The amount of diffraction that occurs in any wave is dependent upon the wavelength of that wave." "Lower frequencies can bend around an object easier than high frequencies." Why? [link] [comments]  |
| How did long distance migration develop in birds? Posted: 09 Sep 2016 02:29 PM PDT I understand that animals disperse and migrate in order to obtain food and for mating, but why is it that they travel thousands of miles to do so? How would such a mechanism develop? Did the birds travel shorter distances, which have increased over time? From an evolutionary point of view, would it not be more beneficial to travel shorter distances due to the risks of such a long travel? [link] [comments]  |
| Is there actually a correlation between high intelligence / IQ and poor social skills? Posted: 09 Sep 2016 10:24 AM PDT Is there any truth about the general interpretation or portrayal of those with high iq's or those with a good knowledge of academics, as they are often portrayed as socially inept, behave in wierd and anti-social/asocial ways, having poor social skills and have troubled minds, both emotionally and psychologically, and even defined as mad or crazy? Or is this just a stereotype of the mad scientist or the troubled genius? Or is there any real truth such as those who study extensively in plenty of academics, or those who have parents who are strict about academic scores and achievements that they leave their children constantly anxious or emotionally troubled and depressed, have tendencies of perfectionism and also poor social skills, since that they would not have that much time or experience in interacting with others or interacting in social events (people say that you find this mostly in Asian cultures but I am not sure if it is entirely accurate ) Or is it a common misconception? for example, when someone meets a person with a high IQ, some would assume that that person has Asperger syndrome, which one of its symptoms is having poor communication/social skills (and may or may not turn into a self fulfilling prophecy) [link] [comments]  |
| [Physics] How does Sonoluminescence work? Posted: 09 Sep 2016 09:32 PM PDT |
| What's the role of topoisomerases and gyrases in DNA replication and how do they do what they do? Posted: 09 Sep 2016 07:17 PM PDT From all I know, the topoisomerases and gyrases somehow prevent or reduce tangling? but I don't really understand what they do exactly or how they do it. My professor just brushed on the topic for a bit, saying it was something akin to winding two strings together, with the enzymes preventing knotting of the string. [link] [comments]  |
| Why don't same touching metal surfaces fuse to each other? Posted: 09 Sep 2016 02:31 PM PDT If two metal surfaces are made of exact material and not corroded or masked in any way, when we make the two surfaces touch, why don't they just bond into one piece? Do we need to break a force like surface tension before they can bond? [link] [comments]  |
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