Why do people with Down Syndrome look the same/very very similar? |
- Why do people with Down Syndrome look the same/very very similar?
- How exactly did knights in full suits of armor actually go about killing eachother?
- What makes certain things bounce and what are the factors that determine if an object is "bouncy"?
- Why is the continental shelf brake at ~450' below sea level uniformly worldwide?
- How do high air temperatures (>50degrees C) affect the epicuticular wax on pine and spruce needles? Will the effects lead to moisture loss in the plants?
- Is it possible for 2 separate species to eventually evolve into the same species again?
- What are the effects of fiber on the absorption of fructose?
- What kind of carabineers are used in space walks?
- Does lift depend on the distance from the ground ?
- How did species survive in the days just after the K-Pg Extinction event?
- Can we filter gametes for genetic defects and use them for IVF?
- About the matter and antimatter imbalance. Is it possible that anti matter galaxies exist beyond the observable universe?
- It is often said that humans and chimps share ~99% of their DNA. How is this calculated?
- How is it that some animals can go months without eating? Don't they get hungry?
- Why do we squint when trying to see better?
- How much evidence is there to support the idea that altruism in humans is innate?
- Does exercising a tongue make it bigger like other muscles?
| Why do people with Down Syndrome look the same/very very similar? Posted: 30 Dec 2019 10:28 AM PST I feel somewhat bad for asking this question, obviously I know they are all unique but they do seem to share very similar facial characteristics. [link] [comments]  |
| How exactly did knights in full suits of armor actually go about killing eachother? Posted: 31 Dec 2019 02:01 AM PST |
| What makes certain things bounce and what are the factors that determine if an object is "bouncy"? Posted: 31 Dec 2019 02:07 AM PST |
| Why is the continental shelf brake at ~450' below sea level uniformly worldwide? Posted: 30 Dec 2019 02:29 PM PST |
| Posted: 31 Dec 2019 02:21 AM PST |
| Is it possible for 2 separate species to eventually evolve into the same species again? Posted: 30 Dec 2019 10:21 PM PST |
| What are the effects of fiber on the absorption of fructose? Posted: 31 Dec 2019 01:24 AM PST What effect does consuming fiber have on the absorption of fructose by the liver? Does the fiber just slow the process down by diluting the fructose in your stomach or is there another mechanism in play? [link] [comments]  |
| What kind of carabineers are used in space walks? Posted: 30 Dec 2019 10:13 AM PST Do they have to account for how cold it is in space? Are they speciality made? Could I take some used for rock climbing and use them for a space walk? [link] [comments]  |
| Does lift depend on the distance from the ground ? Posted: 31 Dec 2019 03:01 AM PST I saw a picture of the largest diamond pit mine in the world, in Russia, with text claiming that it is so large and so deep that helicopters flying over it drop, as if sucked in. To what extent does lift depend on the ground (apart from the ground effect) exhibited by flying close to the ground or water surface)? Here's one of the sites reporting that helicopters flying over the pit get sucked in: https://www.atlasobscura.com/places/mir-diamond-mine I had learned that lift has been demonstrated to come primarily from mass flow diverted downward by a wing or rotor, and to a much lesser extent by the Bernoulli effect. If this is so, lift should not change if a helicopter flies over a huge pit mine. Is the pit mine helicopter-sucking story real? And if so, how does that work? [link] [comments]  |
| How did species survive in the days just after the K-Pg Extinction event? Posted: 30 Dec 2019 09:26 AM PST The K-Pg Extinction event (aka the Chicxulub impact, widely known as being the impact that killed the dinosaurs) "devastated the global environment, mainly through a lingering impact winter which halted photosynthesis in plants and plankton" (Wikipedia). And yet numerous different species, the ancestors of all organisms today, somehow pulled through. How, exactly, could anything survive this? How did plants survive without sunlight, or animals survive without anything to eat? I can understand scavenging for days and weeks on dead plant matter and decaying cadavers, but how was this sustainable for months and years? I just don't get what the means of survival were for long enough for the dust clouds to subside and photosynthesis to resume. Thanks for any insight. [link] [comments]  |
| Can we filter gametes for genetic defects and use them for IVF? Posted: 31 Dec 2019 01:41 AM PST I think that altering embryonic human DNA is illegal (based on coverage of that Chinese doctor who was recently convicted), but even if that's true for embryos AND gametes, maybe it's legal to just filter them. Is that possible with today's technology? And if we could filter out defects, could we filter for desirable genes? [link] [comments]  |
| Posted: 30 Dec 2019 06:44 AM PST |
| It is often said that humans and chimps share ~99% of their DNA. How is this calculated? Posted: 30 Dec 2019 10:19 PM PST I am not asking how they gather this data. Rather, is the percentage calculated by base pairs, codons, or individual genes? (E.g. Amount of different base pairs divided by the total amount of base pairs) I'm wondering because this has a potentially significant impact on how the same data is presented. Lets say humans have 4 genes. If we take one normative human and one human with sickle cell anemia (a point mutation) if you calculate by individual genes their dna is 25% different. If you do it by base pairs they are virtually exactly the same. I would assume that it is by codons, and I know that this seems relatively trivial and unimportant but the answer will change how I view these statistics. Edit: spelling [link] [comments]  |
| How is it that some animals can go months without eating? Don't they get hungry? Posted: 30 Dec 2019 09:14 PM PST |
| Why do we squint when trying to see better? Posted: 30 Dec 2019 07:35 AM PST |
| How much evidence is there to support the idea that altruism in humans is innate? Posted: 30 Dec 2019 03:08 AM PST Just saw this on reddit and it's really fascinating but I'm not sure how much the idea of innate altruism is supported. I once heard a biologist speak rather negatively of it. Is there any evidence that we actually are wired to help one another? [link] [comments]  |
| Does exercising a tongue make it bigger like other muscles? Posted: 29 Dec 2019 08:58 PM PST "Regular" (for lack of a better term) muscles will get bigger and stronger when put through exercise like going to the gym but I was wondering, if you could for example lift weights with your tongue, would your tongue get bigger? Would it make any sort of change it? [link] [comments]  |
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