Africa declared that it is free of polio. Does that mean we have now eradicated polio globally? |
- Africa declared that it is free of polio. Does that mean we have now eradicated polio globally?
- AskScience AMA Series: We're are cosmologists at the online Cosmology from Home 2020 conference, ask us anything!
- Assuming it is constructed in a way detectable to our currently level of technology, if an extraterrestrial vessel/probe were present in the Solar System, how would we detect it? How long would detection/confirmation take?
- How can we know the properties of an artificial element that doesnt even last a secons?
- Can Black Holes Evaporate Into Neutron Stars?
- Why do we receive ultraviolet radiation instead of gamma rays from the Sun?
- Neutron bomb, what happened to it and how did it work?
- If water is made up of 2 atoms of hydrogen & 1 atom of oxygen, then why can't we manufacture water?
- How can a halocline exist for a long time? How is the concentration gradient not enough to level the salt concentrations?
- Why are facial recognition algorithms "racist"?
| Africa declared that it is free of polio. Does that mean we have now eradicated polio globally? Posted: 28 Aug 2020 02:37 AM PDT |
| Posted: 28 Aug 2020 04:00 AM PDT We are a bunch of cosmologists all currently attending a large online cosmology conference Cosmology from Home: 2020. We have a wide variety of expertise within cosmology, from very theoretical and speculative early universe models down to the detailed observational analysis of data from large telescopes (and most of the evolution in between). We're keen to answer questions about what the state of cosmology is in 2020, e.g.:
You can still ask all your burning questions about general cosmology, but seeing as we're all at a conference where people are presenting their present-day research we thought we'd try to frame the AMA towards that present-day state of cosmology. We'll start answering questions from ~7pm GMT (3pm ET/12pm PT) as well as livestreaming our discussion of our answers via YouTube (link coming soon!). [link] [comments]  |
| Posted: 28 Aug 2020 01:48 AM PDT |
| How can we know the properties of an artificial element that doesnt even last a secons? Posted: 28 Aug 2020 05:07 AM PDT For example, if we create the next element, what properties would it have? And how can we know? [link] [comments]  |
| Can Black Holes Evaporate Into Neutron Stars? Posted: 28 Aug 2020 05:05 AM PDT I'm very much a lay-person in science, so all my attempts to Google this answer have directed me to sources very much beyond my ability. My understanding is that a black hole is a very dense thing, and that a neutron star is a less dense thing both caused by collapsing stars that no longer have enough outward force holding up their massive mass. (Forgive me if I don't use any correct terminology). Well, if a black hole can slow evaporate by losing particles through Hawking Radiation does that mean it can one day lose its denseness and become something like a neutron star. Or once something has collapsed to a density of a black hole is it stuck in that density forever? If I got the smallest possible black hole and using magic split it in half so it contained half the mass, would it continue to be a black hole or would it eventually have enough outward force to "uncollapse" and stop being so dense? Thank you [link] [comments]  |
| Why do we receive ultraviolet radiation instead of gamma rays from the Sun? Posted: 27 Aug 2020 10:23 PM PDT |
| Neutron bomb, what happened to it and how did it work? Posted: 27 Aug 2020 11:12 PM PDT President Carter killed the the neutron bomb development project. How was it supposed to work? [link] [comments]  |
| If water is made up of 2 atoms of hydrogen & 1 atom of oxygen, then why can't we manufacture water? Posted: 27 Aug 2020 11:06 PM PDT They say 1 unit of water element = 2 atoms of hydrogen+1 atoms of oxygen. If this is true, then why can't we artificially add 2 atoms of hydrogen & 1 atom of oxygen and make the water at our own? Why can't we do it? [link] [comments]  |
| Posted: 27 Aug 2020 02:41 PM PDT |
| Why are facial recognition algorithms "racist"? Posted: 27 Aug 2020 12:18 PM PDT I have heard that facial recognition algorithms have more false positives for black and Asian faces than white faces because of the way they are programmed. However, surely there SHOULD be more false positives for Asian and black faces? I'm not trying to be racist here, but they are much less varied than white faces, especially in photos where the resolution may not be great. In a photo any blemishes, flushes, spots, freckles, or other unique facial features show up much more clearly on paler skin. As well as that there tends to be more variance in eye and hair colour in white people. So shouldn't a higher false positive rate be expected in these groups? [link] [comments]  |
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