Huddersfield Posted April 9, 2019 Share Posted April 9, 2019 2 hours ago, Ally Bongo said: https://en.wikipedia.org/wiki/List_of_impact_craters_on_Earth It's not a subject that makes pleasant reading and i cant remember exactly but since the dinosaur killer 65 million years ago there have been something like 70 or 80 similar sized meteor hits from then till now So it works out that they happen every 800,000 years or so on average Humans in our current form have only been around 200,000 years max so the odds of one of us experiencing a major extinction event in our lifetime are very small. Arguably humanity could survive a big one - it all depends where it hits Think that's why the dinosaurs were fucked - they were unlucky The debate around how long dinosaurs survived after the impact is interesting. The different factors that affected different creatures (falling temperatures, loss of habitat, impact on the food chain, etc.) has led to speculation that their demise could have taken anything from a few years to 10,000+ years. Inevitably, different species probably shuffled off the planet in different timescales. I read something a while ago as well that said that had the dinosaurs in the vicinity of the hit been sufficiently sentient to be able to look at the sky & make observations, they'd still probably never have known it was coming, as the compressed air would have vapourised them before they'd have spotted it. I think what humanity possesses that dinosaurs (obviously) didn't is the capacity to predict, control & alter our environment so that if we predict an impact, the preparation time would still allow for some salvaging of the human race. Quote Link to comment Share on other sites More sharing options...
Eisegerwind Posted April 9, 2019 Share Posted April 9, 2019 9 minutes ago, Ally Bongo said: It's a brain thing Being 20 feet tall and having 13 inch teeth in some cases is pretty advanced .....  Yeah, but why didn't they evolve to have better brains and form an advanced society, were they all full on Thatcherites. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 9, 2019 Share Posted April 9, 2019 24 minutes ago, Eisegerwind said: Yeah, but why didn't they evolve to have better brains and form an advanced society, were they all full on Thatcherites. Think it's to do with the oxygen levels at that time and that they didnt need to It's like Crocodilians - while they have still evolved over time they havent changed much because they are really succesful at exploiting a niche and their habitat hasnt changed dramatically We are their greatest threat  Quote Link to comment Share on other sites More sharing options...
Eisegerwind Posted April 9, 2019 Share Posted April 9, 2019 3 minutes ago, Ally Bongo said: Think it's to do with the oxygen levels at that time and that they didnt need to It's like Crocodilians - while they have still evolved over time they havent changed much because they are really succesful at exploiting a niche and their habitat hasnt changed dramatically We are their greatest threat  What was the lifespan of yer average dinosaur. Second thoughts I should really read a book! Third thought , new thread.       Quote Link to comment Share on other sites More sharing options...
Huddersfield Posted April 9, 2019 Share Posted April 9, 2019 2 minutes ago, Eisegerwind said: What was the lifespan of yer average dinosaur. Second thoughts I should really read a book! Third thought , new thread. Â 2 Or have a word with Google. Who will probably tell you nobody really knows! Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 9, 2019 Share Posted April 9, 2019 (edited) 10 minutes ago, Eisegerwind said: What was the lifespan of yer average dinosaur. Second thoughts I should really read a book! Third thought , new thread. Â Â Â Â Â Â Depends which dinosaur and it's metabolism T Rex - about 30 Diplodocus about 70 ... unless it got eaten Edited April 9, 2019 by Ally Bongo Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 9, 2019 Author Share Posted April 9, 2019 Technically the dinosaurs did keep evolving, into the many species of birds we see today. Â Quote Link to comment Share on other sites More sharing options...
phart Posted April 9, 2019 Share Posted April 9, 2019 1 hour ago, Toepoke said: Technically the dinosaurs did keep evolving, into the many species of birds we see today. Â specifically Chickens believe it or not. Quote Link to comment Share on other sites More sharing options...
Orraloon Posted April 10, 2019 Share Posted April 10, 2019 12 hours ago, phart said: They did and they built the pyramids then left earth. Where they evolved some more and then came back again. Quote Link to comment Share on other sites More sharing options...
Orraloon Posted April 10, 2019 Share Posted April 10, 2019 For the first time ever, a black hole has been photographed. https://www.space.com/first-black-hole-photo-by-event-horizon-telescope.html?utm_source=notification Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 10, 2019 Share Posted April 10, 2019 How real is that image? I read it was 26 thousand light years away. Surprised you can achieve this resolution without heavy manipulation to get the result you think you should be seeing. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 10, 2019 Share Posted April 10, 2019 To be fair it looks like a doughnut on fire in the oven Quote Link to comment Share on other sites More sharing options...
phart Posted April 10, 2019 Share Posted April 10, 2019 So a black-hole is basically the eye of Sauron. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 10, 2019 Share Posted April 10, 2019 Quote Link to comment Share on other sites More sharing options...
Orraloon Posted April 10, 2019 Share Posted April 10, 2019 52 minutes ago, thplinth said: How real is that image? I read it was 26 thousand light years away. Surprised you can achieve this resolution without heavy manipulation to get the result you think you should be seeing. You could ask "how real is any image?". It's an image based on radio signals. Those signals will have been enhanced by computer to produce a picture that we can "see". I would say that using the word "photographed" might be a bit misleading? Quote Link to comment Share on other sites More sharing options...
Orraloon Posted April 10, 2019 Share Posted April 10, 2019 4 minutes ago, Ally Bongo said: I think your dog has got worms. Quote Link to comment Share on other sites More sharing options...
Mark frae Crieff Posted April 10, 2019 Share Posted April 10, 2019 1 hour ago, thplinth said: How real is that image? I read it was 26 thousand light years away. Surprised you can achieve this resolution without heavy manipulation to get the result you think you should be seeing. Is it not an image generated by Radio telescopes? I believe the collaboration was called "Event Horizon" and involve multiple arrays aso the fella on the news mentioned 50 million light years away.. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 10, 2019 Share Posted April 10, 2019 23 hours ago, Huddersfield said: The debate around how long dinosaurs survived after the impact is interesting. The different factors that affected different creatures (falling temperatures, loss of habitat, impact on the food chain, etc.) has led to speculation that their demise could have taken anything from a few years to 10,000+ years. Inevitably, different species probably shuffled off the planet in different timescales. I read something a while ago as well that said that had the dinosaurs in the vicinity of the hit been sufficiently sentient to be able to look at the sky & make observations, they'd still probably never have known it was coming, as the compressed air would have vapourised them before they'd have spotted it. I think what humanity possesses that dinosaurs (obviously) didn't is the capacity to predict, control & alter our environment so that if we predict an impact, the preparation time would still allow for some salvaging of the human race. Not only that - but "usually" when big objects from space hit they usually plump down and the massive explosion of rock and gasses goes straight up into the air - like a nuclear bomb (and as seen with the crater photos previously). That's why scientists were not convinced for ages that it was wholly responsible for the end of the dinosaurs But they have discovered with the Chicxulub hit is that the crater, rather than being circular, is oval shaped like an egg. This means that before the impact it was travelling downward and horizontally meaning that the blast went somewhat sideways and out rather than straight up That was the rub it would seem Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 10, 2019 Share Posted April 10, 2019 1 minute ago, Mark frae Crieff said: Â "Event Horizon"Â Â Freaked the shite out of me and i've never been able to watch it again Quote Link to comment Share on other sites More sharing options...
exile Posted April 10, 2019 Share Posted April 10, 2019 (edited) I suppose it's difficult to say what we mean by an "image" if it's from radio signals but if it's all part of the electromagnetic spectrum. then it can be "seen" as just another kind of "light". I suppose it depends if you consider an infra red/thermal image/night vision as "seeing". Its not what you actually see, obviously, but its what you "would" see if you had eyes that detected that part of the spectrum. Even for things we can actually see things are not necessarily clear cut - we can see starlight that is trillions of miles away and we can definitely "see" that - so definitely "real" - no fakery or conspiracy required - but even so what is it we are actually seeing? - a blurry dot, probably distorted and our eyesight may not be great in the first place. But I admit it's hard to conceive of resolution at those distances. Edited April 10, 2019 by exile Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 10, 2019 Author Share Posted April 10, 2019 Spacex Falcon Heavy launching again circa 1am BST... https://www.spacex.com/webcast  Quote Link to comment Share on other sites More sharing options...
Eisegerwind Posted April 10, 2019 Share Posted April 10, 2019 6 minutes ago, Toepoke said: Spacex Falcon Heavy launching again circa 1am BST... https://www.spacex.com/webcast  Aye, thanks for that, I've got work tomorrow, the "Of course I still love you" droneship, FFS. Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 10, 2019 Author Share Posted April 10, 2019 1 hour ago, Eisegerwind said: Aye, thanks for that, I've got work tomorrow, the "Of course I still love you" droneship, FFS. Pushed back til Thursday due to high altitude winds. Also tomorrow is the Israeli moon landing... Â Quote Link to comment Share on other sites More sharing options...
phart Posted April 11, 2019 Share Posted April 11, 2019 4 hours ago, Toepoke said: Pushed back til Thursday due to high altitude winds. Also tomorrow is the Israeli moon landing... Â It's pretty mad (in a good way) all these different countries are sending missions to the moon now. Let's hope it's a success. Making travel to the moon common is the first big step in spreading our fledgling space wings. Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 11, 2019 Author Share Posted April 11, 2019 This is what happens when you don't employ Nazis in your space programme.... https://www.bbc.co.uk/news/science-environment-47879538 Â Quote Link to comment Share on other sites More sharing options...
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