The atmosphere is conventionally considered to end at 100 km, or about 62 miles, above Earth's surface, a boundary known as the Kármán line. In reality, there is no sharp boundary where the atmosphere ends. It gradually becomes thinner with increasing altitude, eventually becoming an extremely tenuous atmosphere that approaches a vacuum.
Science News
Sunday, September 27, 2026
A Journey Through the Atmosphere
The atmosphere is conventionally considered to end at 100 km, or about 62 miles, above Earth's surface, a boundary known as the Kármán line. In reality, there is no sharp boundary where the atmosphere ends. It gradually becomes thinner with increasing altitude, eventually becoming an extremely tenuous atmosphere that approaches a vacuum.
Saturday, September 26, 2026
LBN438 Lizard Pillar Nebula
A photographer on Facebook published this image of the LBN 438 Lizard Pillar Nebula, a collection of gas where new stars are born. It is roughly 8 to 10 light-years across and about 1,200 light-years away.
I suspect that nobody has heard of this nebula, but imagine being able to see a completely different part of our galaxy so clearly.
Space is interesting, but it would be almost impossible for humans to ever go there. Maybe thousands of years from now, our descendants will have technology that would make such a trip possible, but it would be extremely costly, probably for very little practical benefit.
This reminds me of a Dilbert cartoon where he said that rather than travel the world, he just looks at pretty pictures online.
Friday, September 25, 2026
Thursday, September 24, 2026
Wednesday, September 23, 2026
Tennessee Stellarator Fusion Plant License
Tennessee grants first fusion license for 400MW stellarator plant
Maybe getting a license is the first step toward building a reactor. I'm not sure whether this represents some sort of breakthrough toward practical fusion. I don't know enough about it to say.
Although practical nuclear fusion would be a tremendous breakthrough for mankind, I am extremely skeptical that we will reach it anytime soon.
If I can believe the numbers I have seen on solar and wind, we should be able to supplement our slowly declining fossil fuel reserves with them. They are not my favorite ways to generate power, however, because of their reliability issues.
For a really long time, I have thought that geothermal was interesting. My reasoning is that there is a tremendous amount of energy inside the planet.
Tuesday, September 22, 2026
Monday, September 21, 2026
Sunday, September 20, 2026
Trump says some childhood vaccines will be split into separate shots
- The MMR Vaccine: Massive global studies tracking millions of children across the U.S., Denmark, the U.K., and Japan found absolutely no difference in autism rates between vaccinated and unvaccinated children. [1, 2]
- Genetics: Strong hereditary factors account for most cases, with single gene variants and familial risk playing massive roles.
Saturday, September 19, 2026
Wednesday, September 16, 2026
Tuesday, September 15, 2026
This Woman Cured Her Cancer with an Insane Method
There have been reports of COVID-19 shrinking tumors, but not consistently.