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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/...


186

"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? ...


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 ...


82

Q Has a virus ever escaped a high-level virus lab? Yes, depending on definitions. How deadly pathogens have escaped the lab — over and over again Most appropriate candidates for an inappropriately cherry picking and restrictive reading of the claim in question: the 1977 "red flu" occurring from China or Russia is thought o be most likely a failed ...


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 ...


46

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

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 ...


31

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 ...


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 days. A ...


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 ...


19

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 ...


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-...


17

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 ...


16

There was one person assigned to the school from the Sheriff's department: Neil Gardner. Source: Investor's Business Daily Gardner was joined by motorcycle patrolman Paul Smoker, who had been writing a traffic ticket nearby. Source: Wikipedia By my definition, that is one armed guard at the school. Smoker was not in any way assigned to the school....


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 ...


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

Statistics A 2015 study pitting the ~50 autonomous cars in California against the nationwide statistics for conventional cars found the accident rate of autonomous cars to be about five times that of the national average, with four times the injury rate. However, the study also notes the very small statistical base -- there were just 11 accidents on file ...


15

Yes, and so much so that it can significantly affect accident rates. A good study exploring this phenomenon is The mixed effects of precipitation on traffic crashes by Daniel Eisenberg. ...analysis shows that the risk imposed by precipitation increases dramatically as the time since last precipitation increases. For example, 1 cm of precipitation ...


13

Heavier cars are safer than light cars. Larger cars are safer than small cars. This applies to SUV's as well especially since rollover is not a factor in late model SUV's with standard stability control. Crash rates from both types of vehicles are similar, with the heavier/bigger vehicle having a major safety advantage. From the IIHS Status Report, Special ...


13

BMW drivers are not the worst on the road: I found a comparison of accident rates for drivers of different cars. The website looked at over almost a million car insurance quotes in order to produce the analysis. The data looks at different car manufacturers and car colours and correlates these with claimed driver accident rates in the five year period ...


11

From a letter to the editors of Hearing Journal: The description of the Aftershokz bone-conduction earphones included the statement, “Because the headphones do not use the eardrums to transmit sound, they allow users to listen to music without risk of eardrum damage.” MP3 player earphones are not capable of producing levels great enough to cause an ...


11

Jobst Brandt, author of "The Bicycle Wheel" (which explains how to build strong bike wheels and which includes a finite-element analysis of spoked wheels) lays out the argument at Sheldon Brown's site: Commercial aircraft, and especially motorcycles, demonstrate that a round cross section tire, like the bicycle tire, has an ideal shape to prevent ...


11

In the UK (for example), tyre repairs must, by law, conform to British Standard BSAU159f:1990. It is likely that equivalent standards exist in your locale. Provided that the repair is made to the standard, the tyre will be safe to use. I imagine the standards apply to normal road use, not when the vehicle is to be used for motorsport or under extreme ...


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