With 89 guns for every 100 people, the U.S. by far has the most number of guns per capita. In total, there are about 310 million weapons in the United States.

While that sounds alarming, the number of guns isn't necessarily the problem. Indeed, according to CNN, several European countries have a high prevalence of gun ownership, as well. Switzerland (46 guns per 100 people), Finland (45 per 100), and Sweden (32 per 100) are all packing pretty serious heat.

At 10:00 AM this morning, my smartphone alerted me that in two months I will have to deliver a thorough review on the physics of boson pairs - a 50 page thing which does not yet even exist in the world of ideas. So I have better start planning carefully my time in the next 60 days, to find at least two clean weeks where I may cram in the required concentration. That will be the hard part!
The realization that livestock like cows are ruminants - and produce a lot of methane while chewing - was a real boon to vegetarian activists because they got to say curbing meat would mean less global warming.

Methane has 23X the warming power of the more popular CO2 in climate change estimates but it drastically shorter in duration. Still, that is enough. When natural gas caused American CO2 emissions from energy to plummet back to early 1990s levels, solar and wind lobbyists and their environmental allies claimed that methane, which they had endorses as an alternative to coal for decades, was suddenly a crisis.

Three detectors tracking gravitational waves emitted by a merger of two black holes have brought science a little closer to locating a gravitational wave's birthplace in space. 

Gravitational waves are ripples in space and time created when two massive, compact objects such as black holes merge. The new detections were made on August 14, 2017 by two gravitational-wave detectors in the United States - Hanford and Livingston at the Laser Interferometer Gravitational-Wave Observatory (LIGO), operated by Caltech and MIT - and by the Virgo Gravitational-Wave Observatory in Italy. This marks the fourth detection of a binary black-hole system.

Two recent studies on the health of bumblebees and links to neonicotinoids were published simultaneously last month in sister publications of the prestigious science journal empire Nature.

Both examined closely similar scientific questions, with somewhat different experimental methodologies. They had one big difference: The study that found that neonics caused no serious issues was ignored by the media while the one suggesting a bee-apocalypse was widely played up as “definitive.’

Let’s unpack what these studies actually showed, and reflect on why the studies have been reported on so differently.

I'm not easily alarmed. Nuclear war, climate meltdown, economic collapse, zombie apocalypse -- nothing really fazes me. I just assume that worst-case scenarios pretty much never happen, so everything will work out in the long run.

Maybe that isn't rational. Throughout all of human history, things often didn't work out. There were countless wars. Infectious disease claimed the lives of hundreds of millions. To this very day, war and starvation kill people in poor parts of the world. Perhaps the political and economic stability of the developed world is just an illusion; in reality, the world is teetering on the brink of chaos, and my blind optimism is based on naïveté and complacency.

This is a good example of a story that has morphed and changed as it gets passed from one paper to another. They all cite the same source, from the BBC but the reporters haven’t read the source. I think they just read each other. The science is actually rather interesting. But just about everything they say is the opposite of what the original story says.

This is the original story on the BBC:

This is what Fox News make of it (notorious for being somewhat unreliable)

I'm getting numerous pm's from very scared and sometimes suicidal people who think the world will end tomorrow. To those who are scared and suicidal - what do you do if you are scared like this? I've written this article to help you.

If you are feeling suicidal right now, of course contact any of us, via pm and post to the group.

The top quark is the heaviest known matter corpuscle we consider elementary. Elementary is an overloaded word in English, so I need to explain what it means in the context of subatomic particles. If we grab a dictionary we get several possibilities, like e.g.- elementary: pertaining to or dealing with elements, rudiments, or first principles

- elementary: of the nature of an ultimate constituent; uncompounded
- elementary: not decomposable into elements or other primary constituents
- elementary: simple

In the wake of Hurricanes Harvey and Irma, many claims have been made that science denial, particularly as it relates to climate change, is primarily a problem of the political right.

But what happens when scientific conclusions challenge liberals’ attitudes on public policy issues, such as gun control, nuclear power or immigration?