Why did the Google molecular weight of methane come out as 20.067?

Hello, I was working on atmospheric composition and asked google methane pubchem molecular weight It came up with 20.067 which traces to https://pubchem.ncbi.nlm.nih.gov/compound/2H4_Methane Now I am tired, but carbon is 12.011 and hydrogen is 1.008*4, so the total should be closer to 16.011 Is this page supposed to be deuterated?  12.011 + 2*4.0282035557 = 20.067407
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Comments about the International Cloud Atlas hosted by the Hong Kong Observatory

Hello, I am visiting CloudAtlas.wmo.int and I keep seeing this red note: Links in the image description will highlight features on the image. Mouse over the features for more detail. But, it actually requires a click for the region on the image to be outlined.  The instruction are correct, but should probably be in blue,
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Broken Links on PCMDI.LLNL.gov – Global Climate Change Models

Karl, Here are some notes on broken links and bad practices.  I put notes on my search for climate models.  I do these rough searches to get started on a complete review of a topic group on the Internet.  Picking a hard enough problem at global scale is the only way to stay organized and
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Tweets about lossless sharing of astronomical images

Related: A desktop photo scanner can get 6400 dots per inch over 8.5*11 inches. That is 3.82976  GigaPixels with 32 bit colors. See also: PetaPixelProject.com with many 10 to 100 GigaPixel images. They use “Atlas Browser Based Viewer” that seems to work.  I am not recommending it, just noting they seem to be able to
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Comment on video Colorful sunrise / convection at sunset – 25 June 2020

UND Atmospheric Sciences – https://www.youtube.com/watch?v=eVvaJnSsri0 No numbers? No radar correlations? No models? No satellite correlations? No corrections for sun angle and lighting? No temperatures or pressures or wind speeds? No science? I expected more from “Atmospheric Sciences”. At least put two cameras and do a little 3D estimation. Frame to frame correlations and velocities? Estimate
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Comments on a video tour of Cern’s Atlas facility

360° tour: ATLAS Experiment – Inside CERN’s largest detector! https://www.youtube.com/watch?v=On1WbLKP8DA Dear Atlas at Cern: There are two purposes for a video like this. One is to simulate what physical visitors do and see if they ever have a chance to visit. You show the parking lot, door, elevator, tunnels, and things. You show things from
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Comment on Virtual Family Trees for Ancestry and the Internet

Even though it might seem extra work, I might log into another account, but rather than make me the manager, I leave them as owner and manager, and invite myself as a DNA collaborator, and invite myself to their tree as Editor. Life is long and the people you help should have some measure of
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Current activities, The Internet Foundation, Aug 2021

For the Internet Foundation I try to track all global sensor networks. One of the dramatic changes the Internet allows is integration of data from many different sensors – cameras, telescopes with cameras, microscopes with cameras, electromagnetic, gravitational, seismic, acoustic. I am trying to get them all to have standards for archiving and sharing, standards
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Post on the Facebook “Allsky Camera” group about satellite transits of star and other things

https://www.facebook.com/groups/172438633343696 Dear Allsky, I went through over a thousand live webcams on the Internet to see what people are sharing live now. My estimate is somewhere around 10,000 overall. Many of them have half sky (show half the image with sky) and in those they will capture comets, meteors, satellites, stars, planets, planes and many
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Some Notes on applications for MEMS gravimeters and their global calibration

Marley, For the last 20 years or so, I have been tracking gravimeter developments, hoping one day they could be developed enough to use in low cost gravitational imaging arrays. I don’t have my notes on what I wrote to you.  My memory is that I saw you were at “earth tide” sensitivity. That is
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