Activity Stream

We are going to have to replace gas boilers with electric heat pumps for domestic heating and hot water. Why do heat pumps use a refrigerant? ...

https://www.newsmax.com/politics/ufos-pentagon-elizondo-space/2021/03/23/id/1014833/ Well, how many are willing to bet more than a cup of...

Usually when a technological innovation makes life easier and simpler, we adopt it. Why not with those?

Will the Coalsack condense into a star cluster? Or is there some reason it can't?

If I understand, string theory says there may be about a dozen dimensions, most of which are imperceptible to humans. Is anyone considering, or has...

What could you deduce from these night skies? To me, they look often like a view from the edge of a galaxy, or a world in an irregular galaxy....

Hi Folks: Another one that's stumping my wife and I. From Wikipedia: "The point at which tidal forces destroy an object or kill a person will...

Could we tell if this was in for the long haul?

I think it would only be useful if it could be applied to everyone.

https://cdn.cnn.com/cnnnext/dam/assets/210324132112-messier-87-polarisation-exlarge-169.jpg The polarized picture of the M87 is magnificent. Any...

This is pretty good. The return of "extinct" species: Lazarus taxons https://www.cbsnews.com/news/the-return-of-extinct-species/

What are hiccups for? How did they evolve?

"Largest neutrino telescope in the Northern hemisphere commissioned at lake Baikal" https://tass.com/science/1265679

At one time, not that long ago, the editing panel contained a strikethrough option; highlight a text string, select the icon, and voila, your text...

I haven't been able to find one larger than the first few light years. I am curious about the "stages" of interstellar colonisation we would...

SpaceX just conducted its fourth high-altitude flight test with a Starship prototype (SN11). Once again, there was a slight explosion! The post...

Hi Folks: My wife walks in to the bedroom, looks at me, and says: So, when a sufficiently large star supernovas a black hole will form. That...

According to the wikipedia timeline of the far future, in 500 - 600 million years C3 photosynthesis will cease and approximately 99 percent of...

Will everything that we move from Earth to Mars effect Earth's thermodynamics negatively? If we are moving material from one planet to another what...

Kind of a weird question but my thinking is that if gravity from a black hole traps light does that make gravity faster than light? Gravity from a...

A great way to revisit that era, the shuttle space program, and a respectful way to revisit the absolute heartache of that sad day. So many good...

An alternative to general relativity predicts wormhole travel is possible, but only if you're teeny-tiny. The post Wormholes Could Allow Travel...

A new study offers a new take on why 'Oumuamua could not have been an alien probe: a lack of motivation! The post Oumuamua Isn’t an Alien Probe,...

So, you want to create life? You’re going to need some ingredients first. On Earth four billion years ago, you might find some of those ingredients...

I was reading an article about Biden's science budget proposal, and there is a section that reads: I have never seen the word "breakout" used...

I've been looking for an answer, and haven't found one.