AskScience AMA Series: We are humpback whale experts & enthusiasts who created a PBS/BBC documentary "The Whale Detective." Ask us anything! |
- AskScience AMA Series: We are humpback whale experts & enthusiasts who created a PBS/BBC documentary "The Whale Detective." Ask us anything!
- Does the saliva you swallow get "recycled"?
- If Betelgeuse were to go supernova what could we learn from it?
- Can a perfectly rigid body become tidally locked?
- How exactly does hair, fur, or feathers retain heat?
- You never see other satellites when watching footage from the ISS, why?
- How do unhatched birds not run out of oxygen in the egg?
- How deep do the deepest sea creatures live that we know of?
- Are there parts of our DNA that aren't attributable to ancient Homo Sapiens, Neanderthals, or Denisovans?
- Do we know of any human ancestor infant or child remains?
- How does electricity damage us?
- Why is potential energy negative when an object is at a solid or liquid state?
- Why do salmon and eels need to migrate up rivers to reproduce? Why can't they spawn where they live?
- Do computers ever "miscalculate"?
- Are most solar systems in our galaxy roughly aligned with the galactic disk?
- When a rocket is going to the moon, why not launch straight up?
- Are planes affected by the differences in earth rotation speed between the equator and places north/south from it?
| Posted: 16 Jan 2020 04:00 AM PST Hi, I'm Tom Mustill, wildlife filmmaker and whale enthusiast. After a humpback whale breached on top of me in 2015 (you may have seen the viral video), I became obsessed with learning about who this whale was and why it had done this. I learned about a lot more about humpbacks and their current situation along the way, culminating in a documentary film you can watch now, titled "The Whale Detective." I'm joined by Dr. Joy Reidenberg, Professor at the Icahn School of Medicine at Mount Sinai in New York City. As an expert in whale anatomy, Joy was a tremendous help as a scientific advisor and correspondent for the film. We'll be answering your questions at noon ET (16 UT). Ask us anything! [link] [comments]  |
| Does the saliva you swallow get "recycled"? Posted: 16 Jan 2020 03:04 AM PST |
| If Betelgeuse were to go supernova what could we learn from it? Posted: 16 Jan 2020 01:56 AM PST With all this talk about how Betelgeuse could go supernova soon in Astronomical time it got me curious. Say Betelgeuse were to go supernova in the recent future what scientific information could we learn from it and could we test any theories that we currently cannot? [link] [comments]  |
| Can a perfectly rigid body become tidally locked? Posted: 16 Jan 2020 04:29 AM PST |
| How exactly does hair, fur, or feathers retain heat? Posted: 16 Jan 2020 05:01 AM PST |
| You never see other satellites when watching footage from the ISS, why? Posted: 15 Jan 2020 02:41 PM PST |
| How do unhatched birds not run out of oxygen in the egg? Posted: 15 Jan 2020 05:45 PM PST I read somewhere that bird eggs are porous enough to allow for gas exchange between the inner nutrient fluid and the air, negating the need to pack all the oxygen the embryo would need when the egg is produced. But how can there be enough surface area or fast enough diffusion to sustain an organism that will grow to be nearly the size of the egg itself by the time it hatches? The reason that all but the smallest organisms evolved dedicated gas exchange organs is because they don't have enough surface area to sustain all their cells with oxygen through diffusion through the skin alone. I'm assuming you can't feel the air currents going in and out of a bird egg like you can feel the air flowing in and out of a baby bird's nose, so the diffusion process isn't that fast, right? How do bird fetuses (is that what they're called?) get away with essentially breathing through only the surface area of the egg? [link] [comments]  |
| How deep do the deepest sea creatures live that we know of? Posted: 15 Jan 2020 01:51 PM PST |
| Posted: 15 Jan 2020 08:55 AM PST Another way of asking this would be, "Are there any markers in modern Humans' DNA that point to an as-yet-unidentified group of homonids?" Having recently read a few pop-sci books about genetics (a little knowledge is a dangerous thing but The Tangled Tree is amazing nonetheless), I was a little shocked at how fluid the genetic realm can be, and the number of evolutionary "cousins" our immediate ancestors co-existed with at different times. Does genetic science currently point to any "mystery" groups in our lineage that we haven't yet found any physical/archaeological/paleontological evidence of? [link] [comments]  |
| Do we know of any human ancestor infant or child remains? Posted: 15 Jan 2020 06:19 PM PST |
| How does electricity damage us? Posted: 15 Jan 2020 01:24 PM PST I am interested in an in depth explanation of how electricity can actually damage/kill humans. I don't understand how excess electrons can do things like cause the heart to stop beating. I'd assume they interfere with the neurons that control the heart but how does that interference happen on a molecular, atomic, subatomic level? [link] [comments]  |
| Why is potential energy negative when an object is at a solid or liquid state? Posted: 15 Jan 2020 04:40 PM PST |
| Why do salmon and eels need to migrate up rivers to reproduce? Why can't they spawn where they live? Posted: 15 Jan 2020 05:53 AM PST |
| Do computers ever "miscalculate"? Posted: 15 Jan 2020 07:57 AM PST |
| Are most solar systems in our galaxy roughly aligned with the galactic disk? Posted: 15 Jan 2020 01:13 AM PST I'm a bit of a back yard star gazer with a telescope that's just about powerful enough to see some of the Jovian moons, and this got me thinking about the relationship of planetary systems to their solar system, and by extension, the relationship of solar systems to their galaxy. Most (God dammit Uranus!) of the planetary systems in our solar system have an axis of rotation that's sort of similar to the axis of the sun and the ecliptic plane, which I understand is a product of the rotational inertia of whatever gas cloud we all formed out of. My question then is, does this relationship extend to the larger scale of our galaxy? Are most of the star systems spinning in the same plane? Is there a common, galactic up and down? Or if we look at neighbouring systems, do we see them at weird angles from our perspective? In which case, why does this rotational relationship not exist on the galactic level? [link] [comments]  |
| When a rocket is going to the moon, why not launch straight up? Posted: 15 Jan 2020 08:37 AM PST I know you have to go sideways to get to orbit, but if you're going to the moon anyway, why not use the moon's orbital velocity for that? In principle it should be possible to go straight up, reach apoapsis a few hundred km away from the moon and go into lunar orbit directly that way, shouldn't it? [link] [comments]  |
| Posted: 15 Jan 2020 01:52 AM PST Do planes drift as they head away from the equator since they have inertia from the speed of the equator rotation? [link] [comments]  |
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