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  #1626  
Old 06-23-2022, 08:35 AM
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Default Re: Drive by science

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It would be like if humans reproduced by suddenly growing an appendage which was then dipped into lava where it would melt off but not before depositing hardened heat resistant crystal eggs.
:boythink::writing:
Don't forget that this lava-crystal process is only done by humans who had resulted from permanent physical mergers of humans who had hatched from such crystals, in an alternation of generations.
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  #1627  
Old 06-23-2022, 07:30 PM
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I read some of your foolish scree, then just skimmed the rest.
 
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Default Re: Drive by science

Why do it once when you can do it multiple times! This little one was the size of the eye of a needle yesterday at this time, but luckily I was prepared enough to get a real photo.

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  #1628  
Old 06-30-2022, 02:50 AM
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Default Re: Drive by science

Thread on ancient wolf DNA and genetics of dog domestication

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  #1629  
Old 07-12-2022, 04:39 PM
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Default Re: Drive by science




We have all seen this picture by now and I think most of us probably know that it shows gravitational lensing.
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Asked by Mandl to publish on the subject of gravitational lensing, Einstein at first declined, citing the fact that the phenomenon was unobservable. But Mandl persevered, and eventually, Einstein agreed to a brief publication in the journal Science:


In this brief note, Einstein also presented formulae for the optical properties of a gravitational lens. They are the exact same formulae which he had derived some 24 years earlier, right down to the formula for the magnification factor. Mandl receives an honourable mention as the person who had asked Einstein to derive and publish these results.


A brief history of gravitational lensing « Einstein-Online

Eventually we discovered quasars which turned out to be galaxies and we were able to find evidence of lensing.

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The first gravitational lens was found in 1979 by Dennis Walsh, Robert F. Carswell and Ray J. Weymann, who identified the double quasar Q0957+561 as a double image of one and the same distant quasar, produced by a gravitational lens.
Einstein initially thought of double images, but reality is more complex with Einstein crosses (4 images) and rings also being possible.
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  #1630  
Old 07-13-2022, 08:26 AM
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Default Re: Drive by science

Yesterday and today was a "supermoon," so I spent some time trying to get a picture. This is pretty heavily edited and cropped, but it looks pretty good.

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  #1631  
Old 08-01-2022, 07:10 PM
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Default Re: Drive by science

Every day is getting shorter / Never seem to find the time

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On 29 June this year, Earth racked up an unusual record: its shortest day since the 1960s, when scientists began measuring the planet’s rotation with high-precision atomic clocks.
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According to Nasa, stronger winds in El Niño years can slow down the planet’s spin, extending the day by a fraction of a millisecond. Earthquakes, on the other hand, can have the opposite effect. The 2004 earthquake that unleashed a tsunami in the Indian Ocean shifted enough rock to shorten the length of the day by nearly three microseconds.

Anything that moves mass towards the centre of the Earth will speed up the planet’s rotation, much as a spinning ice skater speeds up when they pull in their arms. Geological activity that pushes mass outwards from the centre will have the opposite effect and slow down the spin.
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  #1632  
Old Today, 02:07 AM
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I saw a lovely hawk of some kind perched in a tree by my backyard. I took a bunch of photos, and while I was processing them today, I noticed two bands on the bird. Curious, I searched about this, and discovered I can report this to the USGS. If I had known about the band, I probably would have actually tried to get a better shot of them.

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  #1633  
Old Today, 09:06 AM
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Default Re: Drive by science

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and discovered I can report this to the USGS.
The US Geological Survey?
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