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206

In summary there appears to be at least 18 gun incidents in, or around, schools between 1st January and 14th February 2018. They are not all of the "mass shooting" variety one might expect from the headlines but they have certainly all involved the accidental or intentional letting off of a firearm. A few notes I count 17, not 18 The 18th has been found (H/...


182

"Were children safer in the good old days?" We have four definition problems here: What age are included when talking about "children"? What risks are included and excluded in "safe"? When were the "good old days"? What geographic regions are included? Just the US? UK? Western-style cultures? The globe? Interpretation #1: Children under 5 years, all ...


119

The BIC FAQ says the hole in the cap is to prevent children from choking to death. It was quoted in the question: The reason that some BIC® pens have a hole in their cap is to prevent the cap from completely obstructing the airway if accidently inhaled. This is requested by the international safety standards ISO11540, except for in cases where the cap is ...


81

The introduction of the international standard ISO 11540:2014 “Writing and marking instruments — Specification for caps to reduce the risk of asphyxiation” already makes clear that the intention of the design is to reduce the risk of asphyxiation for children. If a child inhales a pen cap it might become lodged below the larynx and block the trachea. The ...


61

It depends on what you classify as 'school shooting' and most people would consider this number too high. You can find an overview over 17 incidents (together with news sources) at: everytownresearch.org The list include all gun-related incidents near or in schools like: A disagreement between two 16-year-old students escalated when Jonah Neal pulled ...


59

Some studies came to the conclusion that bare knuckle boxing may be safer because people punch harder with gloves. This was also attributed to it being painful to punch really hard with just your fists. Here's a good summary of the studies: Smith and Smith et al. found that the boxing and karate gloves were not particularly effective in preventing ...


47

Many of the frequently quoted statistics don't convincingly show a protective affect from helmets. Cycling is an inherently safe activity where serious accidents are rare. This makes it harder to judge the effectiveness of safety interventions. Small behavioural changes can add significantly to the rate of accidents and confounding factors can easily sway ...


47

Unlike seatbelts found in cars, a seatbelt on an airplane isn't there to save you if the plane slams front first into the ground or is hit by a missile. It's there to keep you safe in the event the plane makes a sudden move or has a minor accident. This commonly happens when flying through turbulence. Sudden movements could also happen during a bad ...


40

It's not just your culture. Advice from the US National Weather Service includes: Stay away from windows and doors, and stay off porches. The answer to this related question (including the transcript of interview with meteorologist John Jensenius) and this advice from National Geographic gives some reasons for the advice. Metal frame windows and doors ...


35

Studies that have ever been published or scrutinised outside razor companies seem to be rather difficult to come by. The best I could find was Measurement of beard hair removal efficacy using image analysis, a study conducted by researchers at Gillette (kudos to Solveig_A on Reddit for fetching the full-text for me). Now, a warning: this study's primary ...


35

This is a claim that is really easy to make. Banana peel hazards Can you really slip on an old banana peel?: The banana peel fall: It"s a myth […] Contrary to comedic genius, […] a single peel isn't a guaranteed fall magnet. If the physics behind this gag is not as promising, then why invent such a comedic device? QI Series H, Episode 12 (including ...


30

Apparently yes. There was extensive news coverage of this, which eventually points back to this ABC News report from June 1st, 2015. The report references an internal government report, which is not published on the TSA's website with other public or partially redacted reports, at least at this time. The news story states "undercover investigators were ...


29

There has been a similar debate in the UK (for an argument in favor see here). Moreover few doubt that unpasteurised milk tastes much more pleasant and it may even be more nutritious (for the nutrition argument see here). Beware, though, of some of the positive health claims made by the "raw milk" movement as they smack of the lack of skeptical analysis ...


27

As well as personal experience from eating onions that were cut not on the same day. From the National Onion Association: Leftover Onion and Cut Onion Q: Are cut onions or leftover onions poisonous? A: When handled properly, cut onions are not poisonous. After being cut, onions can be stored in the refrigerator in a sealed container for up to 7 ...


26

EDIT 2013/05/21 The CDC recently released statistics for the first time on raw milk consumption, and raw milk-related illnesses. They also released their own conclusions, which, ironically, don't match their own data. However, an article released a couple weeks ago, Raw Milk Reality: Is Raw Milk Dangerous? attempts to examine the best numbers available ...


26

A report from 1987 had 4/5 firefighters surviving entrapment by using a fire shelter. This report was found at the Wildfire Lessons Learned Center, when searching for events with deployed fire shelters. In this case shortly after they deployed their shelters water and fire retardant was dropped on their position by helicopter, and they were rescued at 45mins....


25

The New Scientist calculated the number of deaths per kilowatt-hour question based on the data from International Atomic Energy Agency in 2011. According to the New Scientist: The agency examined the life cycle of each fuel from extraction to post-use and included deaths from accidents as well as long-term exposure to emissions or radiation. They ...


22

Per mile driven, are motorcycle riders more likely to die, more likely to get in an accident, or more likely to get in a severe accident, than the average driver of a four-wheel car? Wikipedia's Motorcycle safety: Accident rates article starts with, According to the U.S. National Highway Traffic Safety Administration (NHTSA), in 2006, 13.10 cars out of ...


21

This answer is making use of Daniel R Hicks links in the comments of the question. The Claim Donald Trump's tweet's phrasing "Since taking office I have been very strict on Commercial Aviation." is, perhaps typically, not very precise. Asked about details, the White House released a statement quoted by factcheck.org: “Last year, the President announced ...


20

Yes One example that springs to mind is the combination of certain species of mushrooms and alcoholic beverages. The mushrooms contain metabolites which inhibit one of the enzymes involved in breaking down ethanol, leading to a buildup of the aldehyde ethanal, which is unpleasant. The ink cap--Coprinus atramentarius (Bulliard ex Fries) Fries--is ...


20

Short answer: nobody knows, because the research simply hasn't been done yet. It's a safe bet that the more hysterical responses are utter nonsense, but the safety of mephedrone (particularly in the long term) is still an unanswered question. Also note the weasel-wording in the ACMD report: "confirmed as a factor in". One of the notable "mephedrone was a ...


19

As a rider myself I'm sure there's a lot of different opinions but let me answer a few points here. "motorcycles have to be extra loud so that people in cars take more notice of them" Is not true. If anything, manufacturers try to make bikes quieter, more fuel efficient and more eco-friendly. For example, Harley Davison, a company know for gas-guzzling, ...


16

There's a good discussion of the issue of driver reaction time and the factors affecting it (with a couple of references) here: http://www.visualexpert.com/Resources/reactiontime.html The best estimate is 1.5 seconds for side incursions and perhaps a few tenths of a second faster for straight-ahead obstacles. Based on that article, I would say that the ...


16

This is a thorny question, both because it is a politicized issue, and because the effects of cannabis use while driving are less well studied than the effects of alcohol, and appear to include a number of confounding factors. Overall, my survey of the literature suggests that there are two questions, which have (surprisingly) different answers: Does ...


16

Germany is an interesting case to study this, as they have stretches of highway with and without speed limits. In a study done in the state of Brandenburg, the effect of putting a speed limit on stretches of highway has been studied by comparing the accident statistics before and after the new limit. On two stretches the speed limit was changed from no ...


15

Image Source To detect blood the smell first has to reach the shark. From The Naked Scientist: Water molecules in general are carried to the shark by water currents. If there are no water currents then it is molecular diffusion, the random movement of molecules that disperses the odour away from the source. In general the travel time of odour ...


15

It cannot be done safely, or with more than limited success. Your results may vary. First, we need to understand how batteries work. Two chemicals with opposite charges are separated in a cell. When a circuit is completed from the cathode (+) to the anode (-), electromagnetism happens and the two chemicals react with each other, releasing electricity, until ...


15

I think the answer is, Yes it certainly can. Is it likely? Electric toasters work much the same way as space heaters or hair dryers, in that they run a current through high electrical resistant wires to generate incredible amounts of heat. Most toasters tend to use Nichrome (alloy of 80% Nickel and 20% Chromium). Electrical resistivity at room ...


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